Nice and simple little skill-based game. I barely struggled on it and I didn't have to use my peripheral vision at all, but then, suddenly, Level 14 came, and... destroyed my life xD
Well, besides this silly little... ehm... whatever that I wrote xD pretty neat game you've made here, like the fact that you get a bonus for daily visiting the game. The gamplay is also quite fun.
I would just suggest to "spice" the game up, by adding background music, sound effects, maybe smoother graphics, more gameplay modes, colors and so on. I think you get the idea.
Anyways, good job on this! ;^)