Change your abilities to combat enemies and level obstacles. Watch out for black tenticals!
NOTE: You can play with an x-box controller with an emulator like Xpadder, I am told this also fixes the Sticky Keys bug. The elevator menu is able to be controlled with the keyboard as soon as the game has saved so you don't have to use the mouse if you don't want to.
Primary instructions:
W:Jump
A and D move left and right
S: Go invisible when yellow or drop ledge when hanging.
J K L or Clicking the screen: Change the color of your body.
SpaceBar: actions for each ability.
R: flip switches and enter doorways