I typically don't like to rate games before I fully complete them, but I've been at this off and on since yesterday afternoon, and I think it's about time I close the tab.
I really like this concept for a game, and I thought that most of the levels were really solid, I especially liked how you could mess up levels 1-3 pretty easily if you're not careful when switching around levels, which makes it feel rewarding to pay attention to the level layouts. I also really liked the collection aspect of level 5 being something sort of passive you do while doing the other levels, which added just a little bit of spice onto the other puzzles.
The artstyle and transitions were very good as well. The art was simple but the usage of color was really helpful for differentiating the different levels and making their layouts more memorable at a glance. The transitions were really visually pleasing as well, while still making it feel sort of "seamless" to transition between the levels if that makes sense.
All this being said, I found level 4 to be pretty frustrating, The questions were just vague enough to leave a few interpretations, but all those interpretations combine with eachother, and the permutations can stack up pretty quick, which might not be a problem if it wasn't so time consuming to try your different ideas for the combination. I also still haven't solved the apple puzzle (Which I'm, assuming gets you a food for the monster), but I'm not sure how much that's just a skill issue, maybe making the hint more clear would help.
By and large, I really liked this game. This concept is so creative, and I had a lot of fun for the first while, but getting hard stuck really killed that for me.