The game's been awesome, though I have one question and one little tip:
*Removing the question with an edit, because I was, indeed, just being dumb. The brain is an astounding thing, and yet, sometimes, it can't figure out that you just need to stack two red things on top of each other.
Tip, a lot of the puzzles are great, but a few of them rely on little "gotchas": small red herrings to make the player think they need to do something else. While this is fine in most games, it's just kind of tiring in puzzle games.