diff --git a/Scenes/DownhillAutoscroller.tscn b/Scenes/DownhillAutoscroller.tscn
index ce50d6f..0b4a6e3 100644
--- a/Scenes/DownhillAutoscroller.tscn
+++ b/Scenes/DownhillAutoscroller.tscn
@@ -12,14 +12,14 @@ __meta__ = {
 tile_set_name = "TestTileSet"
 camera_h_offset = 2.5
 spawning = {
-Vector2( 48, -9 ): "NPC"
+Vector2( 1, 1 ): "NPC"
 }
 
 [node name="Stage" type="TileMap" parent="."]
 tile_set = ExtResource( 1 )
 cell_size = Vector2( 20, 20 )
 format = 1
-tile_data = PoolIntArray( -196611, 4, 0, -196610, 4, 0, -196609, 5, 0, -131075, 4, 0, -131074, 4, 0, -131073, 5, 0, -65539, 4, 0, -65538, 4, 0, -65537, 5, 0, -3, 4, 0, -2, 4, 0, -1, 5, 0, 65533, 4, 0, 65534, 4, 0, 65535, 4, 0, 0, 1, 0, 1, 1, 0, 2, 1, 0, 3, 1, 0, 4, 1, 0, 5, 1, 0, 6, 13, 0, 7, 12, 0, 131069, 4, 0, 131070, 4, 0, 131071, 4, 0, 65536, 4, 0, 65537, 4, 0, 65538, 4, 0, 65539, 4, 0, 65540, 4, 0, 65541, 4, 0, 65542, 4, 0, 65543, 4, 0, 65544, 18, 0, 196605, 4, 0, 196606, 4, 0, 196607, 4, 0, 131072, 4, 0, 131073, 4, 0, 131074, 4, 0, 131075, 4, 0, 131076, 4, 0, 131077, 4, 0, 131078, 4, 0, 131079, 4, 0, 131080, 4, 0, 131081, 18, 0, 262141, 4, 0, 262142, 4, 0, 262143, 4, 0, 196608, 4, 0, 196609, 4, 0, 196610, 4, 0, 196611, 4, 0, 196612, 4, 0, 196613, 4, 0, 196614, 4, 0, 196615, 4, 0, 196616, 4, 0, 196617, 4, 0, 196618, 18, 0, 327677, 4, 0, 327678, 4, 0, 327679, 4, 0, 262144, 4, 0, 262145, 4, 0, 262146, 4, 0, 262147, 4, 0, 262148, 4, 0, 262149, 4, 0, 262150, 4, 0, 262151, 4, 0, 262152, 4, 0, 262153, 4, 0, 262154, 4, 0, 262155, 13, 0, 262156, 12, 0, 393213, 4, 0, 393214, 4, 0, 393215, 4, 0, 327680, 4, 0, 327681, 4, 0, 327682, 4, 0, 327683, 4, 0, 327684, 4, 0, 327685, 4, 0, 327686, 4, 0, 327687, 4, 0, 327688, 4, 0, 327689, 4, 0, 327690, 4, 0, 327691, 4, 0, 327692, 4, 0, 327693, 2, 0, 458749, 4, 0, 458750, 4, 0, 458751, 4, 0, 393216, 4, 0, 393217, 4, 0, 393218, 4, 0, 393219, 4, 0, 393220, 4, 0, 393221, 4, 0, 393222, 4, 0, 393223, 4, 0, 393224, 4, 0, 393225, 4, 0, 393226, 4, 0, 393227, 4, 0, 393228, 4, 0, 393229, 5, 0, 393236, 9, 0, 393237, 10, 0, 393238, 13, 0, 393239, 12, 0, 524285, 4, 0, 524286, 4, 0, 524287, 4, 0, 458752, 4, 0, 458753, 4, 0, 458754, 4, 0, 458755, 4, 0, 458756, 4, 0, 458757, 4, 0, 458758, 4, 0, 458759, 4, 0, 458760, 4, 0, 458761, 4, 0, 458762, 4, 0, 458763, 4, 0, 458764, 4, 0, 458765, 4, 0, 458766, 1, 0, 458767, 1, 0, 458768, 1, 0, 458769, 1, 0, 458770, 1, 0, 458771, 1, 0, 458772, 4, 0, 458773, 4, 0, 458774, 4, 0, 458775, 4, 0, 458776, 13, 0, 458777, 12, 0, 524296, 4, 0, 524297, 4, 0, 524298, 4, 0, 524299, 4, 0, 524300, 4, 0, 524301, 4, 0, 524302, 4, 0, 524303, 4, 0, 524304, 4, 0, 524305, 4, 0, 524306, 4, 0, 524307, 4, 0, 524308, 4, 0, 524309, 4, 0, 524310, 4, 0, 524311, 4, 0, 524312, 4, 0, 524313, 4, 0, 524314, 18, 0, 589833, 4, 0, 589834, 4, 0, 589835, 4, 0, 589836, 4, 0, 589837, 4, 0, 589838, 4, 0, 589839, 4, 0, 589840, 4, 0, 589841, 4, 0, 589842, 4, 0, 589843, 4, 0, 589844, 4, 0, 589845, 4, 0, 589846, 4, 0, 589847, 4, 0, 589848, 4, 0, 589849, 4, 0, 589850, 4, 0, 589851, 18, 0, 655370, 4, 0, 655371, 4, 0, 655372, 4, 0, 655373, 4, 0, 655374, 4, 0, 655375, 4, 0, 655376, 4, 0, 655377, 4, 0, 655378, 4, 0, 655379, 4, 0, 655380, 4, 0, 655381, 4, 0, 655382, 4, 0, 655383, 4, 0, 655384, 4, 0, 655385, 4, 0, 655386, 4, 0, 655387, 4, 0, 655388, 18, 0, 720908, 4, 0, 720909, 4, 0, 720910, 4, 0, 720911, 4, 0, 720912, 4, 0, 720913, 4, 0, 720914, 4, 0, 720915, 4, 0, 720916, 4, 0, 720917, 4, 0, 720918, 4, 0, 720919, 4, 0, 720920, 4, 0, 720921, 4, 0, 720922, 4, 0, 720923, 4, 0, 720924, 4, 0, 720925, 18, 0, 720937, 0, 0, 720938, 1, 0, 720939, 1, 0, 720940, 1, 0, 720941, 1, 0, 720942, 1, 0, 720943, 1, 0, 720944, 1, 0, 720945, 1, 0, 720946, 1, 0, 720947, 1, 0, 720948, 1, 0, 720949, 1, 0, 720950, 1, 0, 720951, 1, 0, 720952, 1, 0, 720953, 1, 0, 720954, 1, 0, 786445, 4, 0, 786446, 4, 0, 786447, 4, 0, 786448, 4, 0, 786449, 4, 0, 786450, 4, 0, 786451, 4, 0, 786452, 4, 0, 786453, 4, 0, 786454, 4, 0, 786455, 4, 0, 786456, 4, 0, 786457, 4, 0, 786458, 4, 0, 786459, 4, 0, 786460, 4, 0, 786461, 4, 0, 786462, 18, 0, 786468, 16, 0, 786473, 3, 0, 786474, 4, 0, 786475, 4, 0, 786476, 4, 0, 786477, 4, 0, 786478, 4, 0, 786479, 4, 0, 786480, 4, 0, 786481, 4, 0, 786482, 4, 0, 786483, 4, 0, 786484, 4, 0, 786485, 4, 0, 786486, 4, 0, 786487, 4, 0, 786488, 4, 0, 786489, 4, 0, 786490, 4, 0, 851982, 4, 0, 851983, 4, 0, 851984, 4, 0, 851985, 4, 0, 851986, 4, 0, 851987, 4, 0, 851988, 4, 0, 851989, 4, 0, 851990, 4, 0, 851991, 4, 0, 851992, 4, 0, 851993, 4, 0, 851994, 4, 0, 851995, 4, 0, 851996, 4, 0, 851997, 4, 0, 851998, 4, 0, 851999, 13, 0, 852000, 12, 0, 852002, 9, 0, 852003, 10, 0, 852004, 5, 0, 852009, 3, 0, 852010, 4, 0, 852011, 4, 0, 852012, 4, 0, 852013, 4, 0, 852014, 4, 0, 852015, 4, 0, 852016, 4, 0, 852017, 4, 0, 852018, 4, 0, 852019, 4, 0, 852020, 4, 0, 852021, 4, 0, 852022, 4, 0, 852023, 4, 0, 852024, 4, 0, 852025, 4, 0, 852026, 4, 0, 917519, 4, 0, 917520, 4, 0, 917521, 4, 0, 917522, 4, 0, 917523, 4, 0, 917524, 4, 0, 917525, 4, 0, 917526, 4, 0, 917527, 4, 0, 917528, 4, 0, 917529, 4, 0, 917530, 4, 0, 917531, 4, 0, 917532, 4, 0, 917533, 4, 0, 917534, 4, 0, 917535, 4, 0, 917536, 4, 0, 917537, 1, 0, 917538, 4, 0, 917539, 4, 0, 917540, 5, 0, 917545, 3, 0, 917546, 4, 0, 917547, 4, 0, 917548, 4, 0, 917549, 4, 0, 917550, 4, 0, 917551, 4, 0, 917552, 4, 0, 917553, 4, 0, 917554, 4, 0, 917555, 4, 0, 917556, 4, 0, 917557, 4, 0, 917558, 4, 0, 917559, 4, 0, 917560, 4, 0, 917561, 4, 0, 917562, 4, 0, 983061, 4, 0, 983062, 4, 0, 983063, 4, 0, 983064, 4, 0, 983065, 4, 0, 983066, 4, 0, 983067, 4, 0, 983068, 4, 0, 983069, 4, 0, 983070, 4, 0, 983071, 4, 0, 983072, 4, 0, 983073, 4, 0, 983074, 4, 0, 983075, 4, 0, 983076, 5, 0, 983081, 3, 0, 983082, 4, 0, 983083, 4, 0, 983084, 4, 0, 983085, 4, 0, 983086, 4, 0, 983087, 4, 0, 983088, 4, 0, 983089, 4, 0, 983090, 4, 0, 983091, 4, 0, 983092, 4, 0, 983093, 4, 0, 983094, 4, 0, 983095, 4, 0, 983096, 4, 0, 983097, 4, 0, 983098, 4, 0, 1048599, 4, 0, 1048600, 4, 0, 1048601, 4, 0, 1048602, 4, 0, 1048603, 4, 0, 1048604, 4, 0, 1048605, 4, 0, 1048606, 4, 0, 1048607, 4, 0, 1048608, 4, 0, 1048609, 4, 0, 1048610, 4, 0, 1048611, 4, 0, 1048612, 5, 0, 1048617, 3, 0, 1048618, 4, 0, 1048619, 4, 0, 1048620, 4, 0, 1048621, 4, 0, 1048622, 4, 0, 1048623, 4, 0, 1048624, 4, 0, 1048625, 4, 0, 1048626, 4, 0, 1048627, 4, 0, 1048628, 4, 0, 1048629, 4, 0, 1048630, 4, 0, 1048631, 4, 0, 1048632, 4, 0, 1048633, 4, 0, 1048634, 4, 0, 1114136, 4, 0, 1114137, 4, 0, 1114138, 4, 0, 1114139, 4, 0, 1114140, 4, 0, 1114141, 4, 0, 1114142, 4, 0, 1114143, 4, 0, 1114144, 4, 0, 1114145, 4, 0, 1114146, 4, 0, 1114147, 4, 0, 1114148, 5, 0, 1114153, 3, 0, 1114154, 4, 0, 1114155, 4, 0, 1114156, 4, 0, 1114157, 4, 0, 1114158, 4, 0, 1114159, 4, 0, 1114160, 4, 0, 1114161, 4, 0, 1114162, 4, 0, 1114163, 4, 0, 1114164, 4, 0, 1114165, 4, 0, 1114166, 4, 0, 1114167, 4, 0, 1114168, 4, 0, 1114169, 4, 0, 1114170, 4, 0, 1179675, 4, 0, 1179676, 4, 0, 1179677, 4, 0, 1179678, 4, 0, 1179679, 4, 0, 1179680, 4, 0, 1179681, 4, 0, 1179682, 4, 0, 1179683, 4, 0, 1179684, 5, 0, 1245214, 4, 0, 1245215, 4, 0, 1245216, 4, 0, 1245217, 4, 0, 1245218, 4, 0, 1245219, 4, 0, 1245220, 5, 0 )
+tile_data = PoolIntArray( -196611, 4, 0, -196610, 4, 0, -196609, 5, 0, -131075, 4, 0, -131074, 4, 0, -131073, 5, 0, -65539, 4, 0, -65538, 4, 0, -65537, 5, 0, -3, 4, 0, -2, 4, 0, -1, 5, 0, 65533, 4, 0, 65534, 4, 0, 65535, 4, 0, 0, 1, 0, 1, 1, 0, 2, 1, 0, 3, 1, 0, 4, 1, 0, 5, 1, 0, 6, 13, 0, 7, 12, 0, 131069, 4, 0, 131070, 4, 0, 131071, 4, 0, 65536, 4, 0, 65537, 4, 0, 65538, 4, 0, 65539, 4, 0, 65540, 4, 0, 65541, 4, 0, 65542, 4, 0, 65543, 4, 0, 65544, 18, 0, 196605, 4, 0, 196606, 4, 0, 196607, 4, 0, 131072, 4, 0, 131073, 4, 0, 131074, 4, 0, 131075, 4, 0, 131076, 4, 0, 131077, 4, 0, 131078, 4, 0, 131079, 4, 0, 131080, 4, 0, 131081, 18, 0, 262141, 4, 0, 262142, 4, 0, 262143, 4, 0, 196608, 4, 0, 196609, 4, 0, 196610, 4, 0, 196611, 4, 0, 196612, 4, 0, 196613, 4, 0, 196614, 4, 0, 196615, 4, 0, 196616, 4, 0, 196617, 4, 0, 196618, 18, 0, 327677, 4, 0, 327678, 4, 0, 327679, 4, 0, 262144, 4, 0, 262145, 4, 0, 262146, 4, 0, 262147, 4, 0, 262148, 4, 0, 262149, 4, 0, 262150, 4, 0, 262151, 4, 0, 262152, 4, 0, 262153, 4, 0, 262154, 4, 0, 262155, 13, 0, 262156, 12, 0, 393213, 4, 0, 393214, 4, 0, 393215, 4, 0, 327680, 4, 0, 327681, 4, 0, 327682, 4, 0, 327683, 4, 0, 327684, 4, 0, 327685, 4, 0, 327686, 4, 0, 327687, 4, 0, 327688, 4, 0, 327689, 4, 0, 327690, 4, 0, 327691, 4, 0, 327692, 4, 0, 327693, 2, 0, 458749, 4, 0, 458750, 4, 0, 458751, 4, 0, 393216, 4, 0, 393217, 4, 0, 393218, 4, 0, 393219, 4, 0, 393220, 4, 0, 393221, 4, 0, 393222, 4, 0, 393223, 4, 0, 393224, 4, 0, 393225, 4, 0, 393226, 4, 0, 393227, 4, 0, 393228, 4, 0, 393229, 5, 0, 393236, 9, 0, 393237, 10, 0, 393238, 13, 0, 393239, 12, 0, 524285, 4, 0, 524286, 4, 0, 524287, 4, 0, 458752, 4, 0, 458753, 4, 0, 458754, 4, 0, 458755, 4, 0, 458756, 4, 0, 458757, 4, 0, 458758, 4, 0, 458759, 4, 0, 458760, 4, 0, 458761, 4, 0, 458762, 4, 0, 458763, 4, 0, 458764, 4, 0, 458765, 4, 0, 458766, 1, 0, 458767, 1, 0, 458768, 1, 0, 458769, 1, 0, 458770, 1, 0, 458771, 1, 0, 458772, 4, 0, 458773, 4, 0, 458774, 4, 0, 458775, 4, 0, 458776, 13, 0, 458777, 12, 0, 524296, 4, 0, 524297, 4, 0, 524298, 4, 0, 524299, 4, 0, 524300, 4, 0, 524301, 4, 0, 524302, 4, 0, 524303, 4, 0, 524304, 4, 0, 524305, 4, 0, 524306, 4, 0, 524307, 4, 0, 524308, 4, 0, 524309, 4, 0, 524310, 4, 0, 524311, 4, 0, 524312, 4, 0, 524313, 4, 0, 524314, 18, 0, 589833, 4, 0, 589834, 4, 0, 589835, 4, 0, 589836, 4, 0, 589837, 4, 0, 589838, 4, 0, 589839, 4, 0, 589840, 4, 0, 589841, 4, 0, 589842, 4, 0, 589843, 4, 0, 589844, 4, 0, 589845, 4, 0, 589846, 4, 0, 589847, 4, 0, 589848, 4, 0, 589849, 4, 0, 589850, 4, 0, 589851, 18, 0, 655370, 4, 0, 655371, 4, 0, 655372, 4, 0, 655373, 4, 0, 655374, 4, 0, 655375, 4, 0, 655376, 4, 0, 655377, 4, 0, 655378, 4, 0, 655379, 4, 0, 655380, 4, 0, 655381, 4, 0, 655382, 4, 0, 655383, 4, 0, 655384, 4, 0, 655385, 4, 0, 655386, 4, 0, 655387, 4, 0, 655388, 18, 0, 720908, 4, 0, 720909, 4, 0, 720910, 4, 0, 720911, 4, 0, 720912, 4, 0, 720913, 4, 0, 720914, 4, 0, 720915, 4, 0, 720916, 4, 0, 720917, 4, 0, 720918, 4, 0, 720919, 4, 0, 720920, 4, 0, 720921, 4, 0, 720922, 4, 0, 720923, 4, 0, 720924, 4, 0, 720925, 18, 0, 720937, 0, 0, 720938, 1, 0, 720939, 1, 0, 720940, 1, 0, 720941, 1, 0, 720942, 1, 0, 720943, 1, 0, 720944, 1, 0, 720945, 1, 0, 720946, 1, 0, 720947, 1, 0, 720948, 1, 0, 720949, 1, 0, 720950, 1, 0, 720951, 1, 0, 720952, 1, 0, 720953, 1, 0, 720954, 1, 0, 720955, 1, 0, 720956, 1, 0, 720957, 1, 0, 720958, 1, 0, 720959, 1, 0, 720960, 1, 0, 720961, 1, 0, 720962, 1, 0, 720963, 1, 0, 720964, 1, 0, 720965, 1, 0, 720966, 1, 0, 720967, 1, 0, 720968, 1, 0, 720969, 1, 0, 720970, 1, 0, 720971, 1, 0, 786445, 4, 0, 786446, 4, 0, 786447, 4, 0, 786448, 4, 0, 786449, 4, 0, 786450, 4, 0, 786451, 4, 0, 786452, 4, 0, 786453, 4, 0, 786454, 4, 0, 786455, 4, 0, 786456, 4, 0, 786457, 4, 0, 786458, 4, 0, 786459, 4, 0, 786460, 4, 0, 786461, 4, 0, 786462, 18, 0, 786468, 16, 0, 786473, 3, 0, 786474, 4, 0, 786475, 4, 0, 786476, 4, 0, 786477, 4, 0, 786478, 4, 0, 786479, 4, 0, 786480, 4, 0, 786481, 4, 0, 786482, 4, 0, 786483, 4, 0, 786484, 4, 0, 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0, 1048627, 4, 0, 1048628, 4, 0, 1048629, 4, 0, 1048630, 4, 0, 1048631, 4, 0, 1048632, 4, 0, 1048633, 4, 0, 1048634, 4, 0, 1048635, 4, 0, 1048636, 4, 0, 1048637, 4, 0, 1048638, 4, 0, 1048639, 4, 0, 1048640, 4, 0, 1048641, 4, 0, 1048642, 4, 0, 1048643, 4, 0, 1048644, 4, 0, 1048645, 4, 0, 1048646, 4, 0, 1048647, 4, 0, 1048648, 4, 0, 1048649, 4, 0, 1048650, 4, 0, 1048651, 4, 0, 1114136, 4, 0, 1114137, 4, 0, 1114138, 4, 0, 1114139, 4, 0, 1114140, 4, 0, 1114141, 4, 0, 1114142, 4, 0, 1114143, 4, 0, 1114144, 4, 0, 1114145, 4, 0, 1114146, 4, 0, 1114147, 4, 0, 1114148, 5, 0, 1114153, 3, 0, 1114154, 4, 0, 1114155, 4, 0, 1114156, 4, 0, 1114157, 4, 0, 1114158, 4, 0, 1114159, 4, 0, 1114160, 4, 0, 1114161, 4, 0, 1114162, 4, 0, 1114163, 4, 0, 1114164, 4, 0, 1114165, 4, 0, 1114166, 4, 0, 1114167, 4, 0, 1114168, 4, 0, 1114169, 4, 0, 1114170, 4, 0, 1114171, 4, 0, 1114172, 4, 0, 1114173, 4, 0, 1114174, 4, 0, 1114175, 4, 0, 1114176, 4, 0, 1114177, 4, 0, 1114178, 4, 0, 1114179, 4, 0, 1114180, 4, 0, 1114181, 4, 0, 1114182, 4, 0, 1114183, 4, 0, 1114184, 4, 0, 1114185, 4, 0, 1114186, 4, 0, 1114187, 4, 0, 1179675, 4, 0, 1179676, 4, 0, 1179677, 4, 0, 1179678, 4, 0, 1179679, 4, 0, 1179680, 4, 0, 1179681, 4, 0, 1179682, 4, 0, 1179683, 4, 0, 1179684, 5, 0, 1245214, 4, 0, 1245215, 4, 0, 1245216, 4, 0, 1245217, 4, 0, 1245218, 4, 0, 1245219, 4, 0, 1245220, 5, 0 )
 
 [node name="Player" parent="." instance=ExtResource( 2 )]
 position = Vector2( 10, -150 )
diff --git a/Scripts/Constants.gd b/Scripts/Constants.gd
index d8562d9..9785e14 100644
--- a/Scripts/Constants.gd
+++ b/Scripts/Constants.gd
@@ -7,6 +7,7 @@ enum ActionType {
 	JUMP,
 	MOVE,
 	RECOIL,
+	SPIN,
 }
 
 enum UnitCondition {
@@ -20,6 +21,7 @@ enum UnitCurrentAction {
 	IDLE,
 	JUMPING,
 	RECOILING,
+	SPINNING,
 }
 
 enum UnitMovingStatus {
@@ -68,6 +70,7 @@ const UNIT_TYPE_ACTIONS = {
 		ActionType.JUMP,
 		ActionType.MOVE,
 		ActionType.RECOIL,
+		ActionType.SPIN,
 	],
 	UnitType.NPC: [
 		ActionType.MOVE,
@@ -79,6 +82,7 @@ const UNIT_TYPE_CURRENT_ACTIONS = {
 		UnitCurrentAction.IDLE,
 		UnitCurrentAction.JUMPING,
 		UnitCurrentAction.RECOILING,
+		UnitCurrentAction.SPINNING,
 	],
 	UnitType.NPC: [
 		UnitCurrentAction.IDLE,
diff --git a/Scripts/GameScene.gd b/Scripts/GameScene.gd
index 4173779..6ec7b21 100644
--- a/Scripts/GameScene.gd
+++ b/Scripts/GameScene.gd
@@ -162,3 +162,5 @@ func handle_player_input():
 		and player.unit_conditions[Constants.UnitCondition.IS_ON_GROUND]
 		and input_table[Constants.PlayerInput.GBA_A][I_T_JUST_PRESSED])):
 			player.set_action(Constants.ActionType.JUMP)
+	
+	player.custom_inputs()
diff --git a/Scripts/StageEnvironment.gd b/Scripts/StageEnvironment.gd
index f25e60b..ef05c03 100644
--- a/Scripts/StageEnvironment.gd
+++ b/Scripts/StageEnvironment.gd
@@ -260,7 +260,9 @@ func check_collision(unit : Unit, collider, collision_into_directions, delta):
 							unit.set_unit_condition(Constants.UnitCondition.IS_ON_GROUND, true)
 							# landed on ground, horizontal component to become magnitude
 							unit.v_speed = 0
+							unit.landed()
 						reangle_move(unit, collider, false)
+						
 					
 					# slope acceleration for DownhillAutoscroller:
 					# set the player's last_contacted_map_elem_type field
diff --git a/Scripts/Unit.gd b/Scripts/Unit.gd
index 7899dae..c676827 100644
--- a/Scripts/Unit.gd
+++ b/Scripts/Unit.gd
@@ -280,3 +280,7 @@ func start_flash():
 func invincibility_ended():
 	# implemented in subclass
 	pass
+
+func landed():
+	# implemented in subclass
+	pass
diff --git a/Scripts/Units/DownhillAutoscrollerPlayer.gd b/Scripts/Units/DownhillAutoscrollerPlayer.gd
index cc5ef80..8609896 100644
--- a/Scripts/Units/DownhillAutoscrollerPlayer.gd
+++ b/Scripts/Units/DownhillAutoscrollerPlayer.gd
@@ -5,9 +5,42 @@ class_name DownhillAutoscrollerPlayer
 export var min_speed : float = 3
 export var max_speed : float = 16
 export var player_initiated_acceleration : float = 8
+export var boost_per_second : float = 10
 
 var last_contacted_map_elem_type : int = Constants.MapElemType.SQUARE
 
+var boost : float = 0 # to movement speed
+
+func execute_actions(delta):
+	.execute_actions(delta)
+	for action_num in Constants.UNIT_TYPE_ACTIONS[Constants.UnitType.PLAYER]:
+		if !actions[action_num]:
+			continue
+		match action_num:
+			# handle custom actions
+			Constants.ActionType.SPIN:
+				spin(delta)
+			_:
+				pass
+
+func spin(delta):
+	set_current_action(Constants.UnitCurrentAction.SPINNING)
+	boost += boost_per_second * delta
+
+func reset_current_action():
+	.reset_current_action()
+	if get_current_action() == Constants.UnitCurrentAction.SPINNING:
+		if not actions[Constants.ActionType.SPIN]:
+			set_current_action(Constants.UnitCurrentAction.IDLE)
+
+func custom_inputs():
+	if scene.input_table[Constants.PlayerInput.GBA_B][scene.I_T_JUST_PRESSED]:
+		if not get_condition(Constants.UnitCondition.IS_ON_GROUND, true):
+			set_action(Constants.ActionType.SPIN)
+	if (get_current_action() == Constants.UnitCurrentAction.SPINNING
+	and scene.input_table[Constants.PlayerInput.GBA_B][scene.I_T_PRESSED]):
+		set_action(Constants.ActionType.SPIN)
+
 func process_unit(delta, time_elapsed : float):
 	# always be movin'
 	facing = Constants.Direction.RIGHT
@@ -27,6 +60,8 @@ func process_unit(delta, time_elapsed : float):
 				if (target_move_speed < Constants.UNIT_TYPE_MOVE_SPEEDS[unit_type]
 				and scene.input_table[Constants.PlayerInput.RIGHT][scene.I_T_PRESSED]):
 					target_move_speed = move_toward(target_move_speed, Constants.UNIT_TYPE_MOVE_SPEEDS[unit_type], player_initiated_acceleration * delta)
+				if target_move_speed > max_speed:
+					target_move_speed = move_toward(target_move_speed, max_speed, player_initiated_acceleration * delta)
 			else:
 				# shallow slope: arctan(.5) = 27 degrees, sin(27) = 0.45
 				# steep slope: sin(45) = 0.71
@@ -50,9 +85,9 @@ func process_unit(delta, time_elapsed : float):
 					if ground_influenced_acceleration == 0:
 						# flat ground
 						if scene.input_table[Constants.PlayerInput.RIGHT][scene.I_T_PRESSED]:
-							end_speed = max(target_move_speed, Constants.UNIT_TYPE_MOVE_SPEEDS[unit_type])
+							end_speed = max(min(target_move_speed, max_speed), Constants.UNIT_TYPE_MOVE_SPEEDS[unit_type])
 						else:
-							end_speed = target_move_speed
+							end_speed = min(target_move_speed, max_speed)
 					else:
 						# incline
 						if scene.input_table[Constants.PlayerInput.RIGHT][scene.I_T_PRESSED]:
@@ -62,13 +97,18 @@ func process_unit(delta, time_elapsed : float):
 					if target_move_speed < end_speed:
 						target_move_speed = move_toward(target_move_speed, end_speed, player_initiated_acceleration * delta)
 					else:
-						target_move_speed = move_toward(target_move_speed, end_speed, ground_influenced_acceleration * delta)
+						if ground_influenced_acceleration > 0:
+							target_move_speed = move_toward(target_move_speed, end_speed, ground_influenced_acceleration * delta)
+						else:
+							target_move_speed = move_toward(target_move_speed, end_speed, player_initiated_acceleration * delta)
 				else:
 					var acceleration = ground_influenced_acceleration
 					if scene.input_table[Constants.PlayerInput.RIGHT][scene.I_T_PRESSED]:
 						acceleration = max(acceleration, player_initiated_acceleration)
 					if target_move_speed < max_speed:
 						target_move_speed = move_toward(target_move_speed, max_speed, acceleration * delta)
+					else:
+						target_move_speed = move_toward(target_move_speed, max_speed, player_initiated_acceleration * delta)
 
 	.process_unit(delta, time_elapsed)
 
@@ -92,3 +132,11 @@ func handle_recoil():
 	hit_queued = false
 	# skip recoil pushback logic, since target_move_speed is already
 	# set to min_speed
+
+func landed():
+	if get_current_action() == Constants.UnitCurrentAction.SPINNING:
+		hit(Constants.Direction.RIGHT)
+		boost = 0
+		return
+	target_move_speed += boost
+	boost = 0
diff --git a/Scripts/Units/Player.gd b/Scripts/Units/Player.gd
index 19bcc62..2ea8f27 100644
--- a/Scripts/Units/Player.gd
+++ b/Scripts/Units/Player.gd
@@ -90,3 +90,7 @@ func handle_recoil():
 		else:
 			h_speed -= RECOIL_PUSHBACK
 	facing = hit_dir
+
+func custom_inputs():
+	# implemented in subclass
+	pass