Use the arrow keys to move, up arrow is jump. don't touch yellow, it is bad for you. white are barriers, so the only way to get through them is up or backward. sometimes you sink into the ground, so where the ground is thing you may fall through. black is ground and the flags are checkpoints. the light green square is the end. there are a few glitches but you can't completely win with them so it is OK. Have fun!
hihihihihihihihihi7ś "scrolling game" gave me the idea