Had a fun time with this one!
I appreciate the game's ability to challenge the player without feeling cheap. The style reminds me of the days I used to play the game Phases on my phone! The controls work well, and the music/SFX fit the mood perfectly (although the audio was glitching out quite a lot for me).
Everything is visually clear. It took me a bit to understand what the goal of the levels were, and what each block does, but it didn't take too long for the blocks (it helps that they're different colors). The difficulty wasn't too easy or hard; After spending a minute on a level the strategy becomes clear. The levels progressed well, nothing out of order!
Another thing about the audio is that on startup, the volume increase is a bit loud (it kind of reminds me of the THX logo sound from childhood)... but other than the glitchy thing, it's great!
Keep up the good work!