Decent game. Needs some polish.
Your level design, concept and interface are well thought out. I only have a few suggestions to take this from a good game to frontpage material.
1) Add some detail to the backgrounds. The layouts worked great, but the plain gray ground and blank black walls fell flat. Just a touch of texture would really improve the overall look of the game.
2) Some sort of audio alert for getting injured. I got fried by that flame that rises and falls right through the floor and didn't even realize I was being cooked until I died. Perhaps you could make the floors block flame as well...
3) Perhaps it's because my system is crap, but the boards with more than a few flames on them caused the game to run so slowly I couldn't even see where I was moving. Something slightly less graphics intensive for the flames would be a welcome addition.
Nice work though. It's a great play, and well worth the high scores it's gotten already. keep up the simple and fun games...they're the ones people keep coming back to.