Great game, but three points of advice:
1. There were too many "tutorial levels" at the start. I found myself getting frustrated by the number of easy puzzles at the start before the actual puzzles started.
2. I know this is going to sound like I'm contradicting myself, but the mechanics were hard to understand and could definitely be explained a little better. I know, I'm complaining about how long the tutorial is one minute and then the next, claiming that the tutorial wasn't good enough, but having me do a bunch of simple, extremely easy puzzles isn't going to help me understand the really complex ones that come up afterwards. I took me until the level before the "valley of flowers" level to really understand all of the mechanics.
3. This is a small thing compared to my first and seconds points, but the "level complete" sound effect is kind of annoying to me. I really like the water splash sound effects, just not the other one.
Overall really good game, and the first one that I have played in this jam that is getting an average score above 4.
edit: Looking at the other comments, it seems like everyone came to the same conclusion that I did (at least with points 1 and 2).