Very solid, clever game. Love the mechanics, and the graphics and sound aren't bad either! I love the sound effects of stabbing stuff, and hooking onto the buttons, they're really great.
While the gameplay is really good, there are a few things I feel could be improved:
- I'd prefer Space as a jump button instead of Up/W
- A few levels ask for fairly precise movement, but that's hard to get due to the lack of a variable jump height, and the player sliding off of platforms.
- A lot of the levels that require timing are very strict - Level 10 in particular is tight enough that I kept losing because the enemy bounced off while the block was fading away.
- The hexagon side of the puzzle piece is too similar to the round side, and I kept getting stuck on one level due to thinking the hex button was the round one. Maybe try a different shape?
Despite that, the game was still a lot of fun, and I like how there were achievements for replayability. It's a very good game overall, and it'd only get better with more levels and mechanics.