Really smoothly designed. Hits that perfect brain consuming puzzle while never loosing momentum. Airtight level design. The only times I couldn't figure out the puzzle solution was when I was overthinking it. Also the sound design is amazing, with an ambient soundtrack supplementing the music you create by moving around the level. Perfect game for pulling you out of the real world for a little while, and I highly recommend it. I would love to see the creator's future projects.