Feels really relaxing to play, which I liked. You do not have to think a lot or really far, but sometimes still need to be clever and notice some patterns
Snap sound is good
Controls were good, I did not have any troubles with doing what I planned
Tutorial right inside the level, other than in a separate tab would be nice
Also there is a problem: when there are too many overlapping boxes, it is not clear from the visuals what is going on (I saw that you tried to make it better with highlighting the current box, which helped indeed)
Overall, enjoyed the game