good game in general, but i think some levels are just a ton of walking, and some levels are basically the same as the ones before it. especially the first 4 levels, which probably could just be one level.
and before introducing color merging, why in the hell would you want 2 puzzles showing literally nothing and are just walking simulators. a lot of the color merging "tutorials" could be compressed into smaller levels, or one level containing multiple insights.
also why in the world are there random borders around some levels