Uploaded a new version. This one has the game over animation idea I got from blah^3 and 3 new control schemes. Press spacebar to cycle through them.
mode 0: Same as the original only you need to press down to go back down (no gravity).
mode1: Same as mode 0 except your acceleration and velocity is set back to zero when you switch directions.
mode2: like mode1 only it has gravity similar to the original mode (you dont ever have to press down).
mode3: original mode.
I think I like mode 2 or 3 best.