I really enjoyed this game and all the efforts you put into "marketing" as well! Your trailer, itch.io page, and screen shots all make the game feel more "finished." Your artwork is excellent too!
The only thing I wished was that the score stayed between levels or my money did. I kept feeling like the level changed before I had an opportunity to shop. I did get one upgrade for the gun, but TBH i don't know what it did. I thought it was super cool that the gun could almost lift me off the ground while i was jumping in a way like the game Downwell kinda does. Great work, and congratulations on submitting!