Very great!
A great game. Good challenge, but the difficulty kinda mixes on each level; a lot of levels are hard, and a lot are very easy, but they're all mixed up. Maybe fixing the order of that would help it a bit? Also add more challenge in the levels.
Some levels are so stupid they were so hard. Got on my nerves.
Overall, its a good game. The only thing keeping it from getting a 10 is the challenge; make it more harder, but don't mix it up or make it so stupid it's hard.