Arrow keys to move, space key and up key to jump. No advertising, if you do, the comment will be deleted and possibly reported. Note: This game is unfinished, and there are many bugs. I know you can go inside the platform sometimes, just get out and do it again, you'll live. :) Also, the bugs may be annoying, but they can help you on most levels.
@ikeepgetbanned helped me with the timer. Check out his Red Cube Platformer (W.I.P.)! Almost everything here is self-made and self-designed, but some of the code was written with help.