Really like the visuals! The game has a nice palette, and neat animations.
The global idea is cool. A dungeon with several mini-games on each face, it's pretty nice to explore. Unfortunately most of the challenge face the same issue: imprecise hit-box. :p I was frustrated a lot of time because I was hit by something that did'nt look that close, or because the range of my sword forced me to take a damage. Combined with the punishing difficulty, it makes the game a bit too challenging.
Also I didn't saw the difference made by the effects. Some way maybe too subtle. And most of the time I was focused on surviving anyway. There are also some rooms I didn't understood very well. Like the labyrinth with walls, or the one with the Operation room (I mean the goal is clear, but sometime one piece start next to the electric bar and is impossible to move, other time I got hit for apparently no reason). There's a lot of ideas, but some don't work really well with the rest and make the game more confusing. Since I died a lot, I didn't have time to familiarize myself with a particular room before having to learn a different one.
But the game was still nice to complete! I particularly appreciate that you can skip some rooms to only complete the one that seem managable. It was a fun dungeon to discover, quite challenging, but in the end still beatable. Good job!