This is a really good game! You found a great way to expand the gameplay's time with the upgrades and keeping it evolving. The game menu is really good, I appreciate having a sound manager and some other personalization features for the experience. Your visuals and sounds are good. It's great to have a saving system, as a long game I'm grateful to have the possibility to pause and continue later.
My biggest complain comes from the background, I think the small rocks obtained the asteroids sometimes get blended with the background's stars. Try to improve the approach to the jam's theme, I think it helps to practice on your creativity.
In future iterarions or versions of the game, you can try to diversify the experience. The different upgrades are a good step towards that direction, but adding twists to the gameplay may help to increase the fun. It's better to always give surprises to the players!
Great job!