Pretty much awesome. When it gets harder and I get more excited, the controls are a bit challenging, but I am using a trackpad and I am extremely excitable.
I love this concept. I was up with my friend's DS playing a game like this in some Mario thinger for 7 hours straight. Not too. Graphics look a bit cheap.
Very nice looking, but requires a bit too much thought. That's for me at least. I come to online flash games for easy amusement and don't like thinking about it too much