I like the game, it's simple and fun to play. However, there is always room for growth.
Improvement:
- Add visual/sound feedback for hits, kills, and money
- Show enemy strength progression. Level transitions need clearer cues
- UI may respond when upgrades can't be bought
- Add score display, health indicators, (maybe) hold-to-fire
Good potential, just needs more juice and clarity.
Thank you for the extra feedback! Visuals and sound are the main focus for the final version so that's coming.
Other people also specifically mentioned some of these things which I was oblivious to as the maker! "Level transitions" are explained in a different comment below, so I will look into adding some sort of notification on the screen.
Also for the upgrades you can't buy, I assume it was just not easy enough to see that the button was slightly grayer?
Hold to fire was also mentioned, but I still have to decide on it :)
