I'll give you credit for the effects on this, but the music gets a little distorted in some parts. I don't know if it's supposed to sound like that or not, but that might be something to check out.
There's not much else you can do with games like these other than the usual addition of levels. I really don't think avoid games hold people's attention for very long either, but that's just my opinion. If you want to get heavy into them, you could submit more theme-based games (volcano, ocean, forest, etc) to accompany your elemental idea.