It's difficult to think with folding; Much more so than with portals. Congratulations, on a game well made! I hope you were ready for the Portal comparisons.
The first was a fantastic 5 star game. Combinations made sense, there were just the right amount, and there weren't phases where retrying things was necessary. It was not a game that needed improvement.
Well put together. There's another like it with better graphics, a story, and some more stuff, but this is definitely better. You feel more like a ninja in this one.
I didn't even know some of these characters had names. Tetris blocks, Contra guy (still don't know), bionic commando guy, portal character, and many many more. Biggest problem is that I've not played any Metal Gear, Final Fantasy, or Chrono Trigger, and they're the most abundant besides Pokemon.