Loved it! Simple, straightforward, addicting. Played it for longer than I'd like to admit even though I only reached the second wave. Well done! Also impressive that you did everything yourself including the music 🤯
Just a few comments:
- The ammo count can get into the negatives (e.g. -52/12 ammo) which gave me infinite ammo

- Would love some tooltips for the upgrades, the images on the upgrades communicate decently but there are a few I wasn't so sure what they were
- Wasn't sure if the manual reload mechanic worked very well with the high enemy density and constant vigilance towards incoming acid rain at first, but I got used to it haha