Use the Left and right arrow keys to move, and spacebar to jump. You can stand on Brown, and you lose a life on red and go back to the start of that level. Try to get to the green on each level. You have ten lives. You can bounce on blue springs. Good luck! Try to get as many points as possible. Progressing through levels, extra lives at the end of the game, and leftover time will give you points. Coins will also increase your score and give you a life and extra time. Try to finish before your time runs out.
You are Batman who is trying to get out of the high-security Arkham Asylum, because Joker's evil cousin or uncle or great nephew twice removed or something escaped.