Poor controls. Biggest problem besides being able to actually move the pieces you want, is being able to look at the puzzle how you want. Having to switch back and forth is very annoying, but also this just doesn't work that well on a computer. In order to fully understand the puzzle you have to be able to touch it.
Amazing game. It's always adding new elements into the mix. The concept is simple, but the puzzles challenging, but in a very reasonable fashion. Only complaint is that there's no way to see the multiplier on the pieces that change the denominator before placing them.
Where's the volume control? Why do developers so often forget to include such a basic thing? And don't tell me to turn off my speakers either. I like to listen to music while I play.
It's kind of nice, but there's way too much precision needed in some levels.. It seems if you're even a pixel off in placing some blocks, you can get a perfect.
Good concept, terrible execution. The earlier levels had the right idea, where there was an actual puzzle element to them. But the later levels were pretty straight forward, and instead relied on platforming. The problem with that are the controls aren't precise enough for this to be a platformer. Also, allow us to zoom out so we can actually see the whole level and not have to perform blind jumps or anything.