Cool concept, but it's brutal on your thumbs! Like nroach44 suggested, adding some key repeat would have made this much more approachable. Also, I think the instructions at the top of the screen should be worded differently so that it's more obvious what you have to do. For example, maybe say "Press L/R to change character" since "<-- DEC. CHAR INC. CHAR -->" is a bit vague.
But besides that, it was actually pretty fun trying to chase down the misbehaving chars. Nice entry!
I wish I could earn $1000/minute fixing typos :P