Played it till 30th level.
The art is simple, I like it. The design is pretty good. I like the transition when you finish one level.
Music is nice but could be extended a bit so it doesn't get boring.
The gameplay is simple and effective, looks unique, it's very easy sometimes and sometimes difficult.
Overall it's good but might get boring after some time. There is only one thing to do, it should get more challenging by adding more obstacles or something that makes it more interesting. Probably after each bonus level. It's pretty good for a game made in 3 days. Keep it up!