Pretty chill puzzler! It's not gonna shake the world up or anything, but the game felt like a very smooth and well put-together experience, with a decently paced progression of mechanics and difficulty. The crisp art and relaxing music really gave a calm, professional vibe to it all, so well done in that regard.
Having said that, and it's perhaps a silly complaint, but I did feel like the game was maybe a bit too minimalist and relaxing in terms of feedback and effects. Heck, I actually thought the game didn't even have sound effects at all at first since they were so muted. I wish perhaps there was some more feedback to make blocks fall and progressing through levels more satisfying, as without it, it did make the game slip from chill/relaxing to maybe a bit boring for me as everything started blending together. Again, I understand if it's against the aesthetic you're going for, though.