Great work, it's an amazing entry! The artwork is gorgeous, and the gameplay mechanics are quite innovative and fun, and the music and sfx are really fitting!
The game also has a fairly good duration, though arguably part of it (~45 min? I guess) is due to not fully understanding mechanics initially.
In particular, I had trouble understanding:
- How to aim the rocket head. A visual feedback to the direction/power like in golf games could help a lot. Initially I was trying to click and drag the head itself as the instructions were not really clear.
- Multiple head jumps provided that you have power for it - it took me a while to understand that it's a possibility, while it's quite core to achieving good results.
- I have a shield! I totally missed that until the very last level (and after spending a good 10 min trying to beat that level with a single life/no shield). While the UI and controls do mention a shield, I don't remember seeing it introduced in-game (might have missed it).
- Bullet hits don't give visual feedback when you don't kill the enemy, and sometimes they keep going even after a hit (might be a bug), so initially I thought I was not shooting enemies properly/at the right time.
Overall the game is much easier once you understand all the controls and mechanics, but since they're not introduced perfectly clearly (though the tutorial is very nice and you already did a good job here), some end up being discovered late/with trial and error.
All that being said, this is one of my favorite games from the jam, kudos!
PS: FYI, you GitHub project includes some files which don't seem related to the project at all, like the README.md which seems taken from a Godot plugin, and possibly other files too (LICENSE), etc. It would be good to clean that up.