Interesting and addicting concept. I like how the first few levels you didn't really have to put any thought into it, but as the level progressed, it became more challenging, but never too much so. Nice!
I love this game, and am not sure why you would complain about it being in shockwave.
I do wish there were more holes though, it took me about 10 minutes to beat 6, and I'm looking forward to more!