Woah, this game was really fun to just go through! Great job in integrating as many unique worlds and mechanics as you can, because it was really cool to just go through each one for the first time! I have a bit of an issue with the water level though, since the first time I played it, I instinctively tried to go up and follow the bubbles instead of down like it was intended. I eventually understood where I needed to go, but I think adding a bit more guidance to each game would have been a bit more helpful. Also, I think the text by the player is a bit distracting. I get that its the player that says the line, but it blocks a significant amount of the screen while you're playing. I think either making the text disappear after a certain amount of time or placing the text at either one of the corners of the screen (making it act like an objective) would allow players to enjoy more of the cool levels you made. Also, having an indication whether you win or lose would have been also appreciated (always couldn't tell whether I beaten the underwater level)
I like the art style in the game, but I think the game has a visual overload problem. I can see that you were trying to play around with effects and particles to make the environments lively, but I think it made it more disorienting and confusing for me to go through. This was especially a problem in the jungle level, since there was so much things flying up that I had a hard time to focus on the equally small bullets that were flying at me. I think the water level was just the right balance of movement in a level, with not that much stuff happening in the background. The space level is also done well, but still has a bit too much stuff going on. The environmental designs though are really thought out and charming, which is really great so good job on that!
I'm really surprised that you were able to compose a song, play your piece live, and put it in the game. I found that really admirable and it adds to the charm of the game! I think adding a bit of sound effects to the game would have really added to the experience! It could have been weird to mix in digital and physical sounds together, so maybe you could have recorded your own sound effects too! I think it would have been pretty fun!
Overall, I really love the direction you took with this jam! This game, too me, seems filled with a lot of heart, effort, and creativity, so I'm really glad you were able to share this with us! You really seem eager to learn, so I just thought to point out some of the things that could be improved upon (so don't take it that badly). The positives really outweigh the negatives, which made this a really fun game to go through! I really enjoyed playing! Great work!