Great idea, though I've seen Mark play a game with a similar mechanic. The gun gets really annoying after a while, though. There's also a bung in level 3 where the platform starts going right and doesn't come back.
Yeah, I've replicated the bug. Its intermittent, so It'll be hard to trace and track down, I had to reload the level 20 times, but you're right, I've got an issue :