I only played the first 5 level due to time constraints. The art style is cute and the sounds are good enough.
The beginning of the game introduces too many mechanics too quickly. I found myself getting overwhelmed a bit. Basic movement mostly works, but occasionally the character would just stop unable to move in a certain direction and I would have to fiddle around a bit until they would move in the correct direction again.
I managed to softlock myself in the 5th level as I missed the first two targets and was unable to go back and get them, and reloading the level put me back at the later checkpoint so I couldn't restart it. Most puzzles on the level reset fully, but some are required to be done in order to navigate the level, so if you die in a certain spot you end up having to do a puzzle more than once to progress. The checkpoints are in some very rough places too, often placed before transitions to other parts of the level.
I encountered a bug on the world map that would cause me to drift around without putting in any inputs, it eventually started working properly, but it was very annoying. Finally, the loading screens were very long.
I know you've been working on this game for a while, so I don't want to be too mean. I streamed the game and someone suggested I send you the video for feedback, so here:
Hopefully it helps.