Thank you for the detailed feedback!
The art and sound effects are all homemade, but the music is not. I got so lucky finding the perfect music on freesounds.
If I ever do another update, I'll be sure to do more with the menus. I was originally planning on adding a weapon shop to give a few different options of shots to fire. Also I'll definitely add more sound effects, and more events, etc.
Also if an event doesn't say that anything happened, then it's just a neutral event that doesn't affect the game play. (The Bonsai planet is pretty though!)
I'm streaming today, so if I find the time I might try your game live as thanks for the detailed analysis!