Arrow keys to move. You are the black dot, and you are trying to avoid the "taggers" the smaller grey dots. I know the game isn't that good, I just made it quickly because I was bored. WARNING: VERY HARD
I did most of it, a little bit from @Ellesong http://scratch.mit.edu/projects/23600596/ with the programming Cloud Highscore: 46 Cloud Highscorer: @cucumberman