Pretty fun, short puzzle game.

If you like piecing together puzzle blocks, or have played The Talos Principle and liked the sigil puzzles, this game is for you. It's a fun little time waster, and it apparently unlocks some stuff for The Talos Principle, so that's cool. The background music is also quite nice, although you will hear all of it in roughly 10 minutes of playtime, and it loops endlessly. This game isn't anything special, but if you're a puzzle nut like me, you'll probably enjoy it for what it is.

Edit: Upon further research, it seems like the codes you unlock no longer work in the game. So that's a shame.