Let me start off by saying the gameplay is very fun. Moving the little butterfly around with your mouse feels great. It does get repetitive after a while though, and I found it you can cheese the game by just hiding in the corner and barely moving, though that does take all the fun out of it so why anyone ever do that. Also, about halfway through the summer stage my mouse cursor just kinda disappeared, which actually made it more fun for a bit? I think it's because the technical issue on my end actually changed the gameplay a bit and broke up the repetitiveness, so that's one idea lmao. I think a bit more player agency would be nice, once again for breaking up the gameplay loop.
Putting all those aside, I enjoyed the different stages and I have to say Spring is definitely my favourite. I think the music and the colours just create this beauty. Great job!