Every button but L does something also for both players hold up and down for some kind of special ability and hold left and right to undo if player 2 has no arm soul grab and undo and if Sans head come off just reload
Sans controls:
1) soul grab
2) release soul grab
3) Bone Spike
4) Floor Bones
5) small spin bone
6) small orange small bone
7) blue small spin bone
8) big spin bone
9) deactivate control 0
0) change background
q) teleport
aswd) Sans movement
Sans special ability) press a then hold w and s hold a and d to undo
e) gaster blaster
r) jump bone
t) bone cage
y) single bone
u) big blue spin bone
i) big orange spin bone
o) close eye press 2 to undo
f) single follow bone
g) hop bones
h) blue bone jump
j) shield "protection from ranged attack"
z) Bones
x) Multi Blue Bone Target
c) Top Target Bones
v) grab bones "hold player in place if touching it"
b) top bones
Chara controls:
arrows) Chara's movement
k) ranged attack
Chara's special ability) hold up and down arrows hold left and right arrows to undo
Note: L, N, and M don't do anything.