Very Original, Lots of Potential Here
Keep making these. You've really got something here.
Graphics were cute and fit the part, though, of course, they are simplistic looking (which is fine if the game's fun, which it is). The music was the same, with a fun quirky tone. Sound effects, too.
Really liked the whole concept. It seems random at first, but if you think about it, it all does have a pseudo-logic to it. You can't use pure logic because that would make it too easy, of course, but you seem to have gotten that thought system down to the point where we can't quite reach it at first, but when we do, we hit our heads and say "that's why, it makes sense".
Also liked all the animations for leveling up.
One thing I didn't like was the tutorial. Yes, I understand this game is hard to explain, but with the sequals (that should be coming, right?), maybe they could be made a little clearer somehow? Like perhaps add an animation effect to demonstrate what you mean with the whole "leveling up" and "combo leveling" concepts...
Also, see if you could extend the replayability a bit. More levels, etc. Awesome job all around, though. Next one, please!