Synthwave and Tanks is a combo I never thought I needed!
If you're planning on sticking with the idea of blowing up tanks as a way to chill, you could try putting in some vaporwave style music. The current classical tune (which I presume is placeholder) doesn't really fit. I got a few picks that you could listen to for some ideas, I imagine the music being just lively enough that it makes you wanna tap a foot to it, but retains that more down-low tempo:
コンシャスTHOUGHTS - Slowly | Bodyline ボディーライン - Elapse | Windows 96 - Rituals |
bl00dwave - Encounters | Internet Club - Logon Cafe | luxury elite - S.W.A.K. |
If you're looking for some ideas for secondary weapons or items the player can pick up, there's this old tank game called Battletanx: Global Assault (specifically the Nintendo 64 version) that has an interesting roster of secondary weapons you can check out for brainstorming. I made an unlisted video for ya that showcases all of them below! I think players being able to explore the map and find extra weapons could be super cool and add variety to the gameplay. I imagine the weapons in your game being tuned for the gameplay/vibe vs. just the same ones as the examples here haha.
In your game, I did notice that there wasn't much reason to not use the Pitch when firing, since it would hit enemies more often than just not holding it down, so maybe Pitch could be used to specifically help target enemies that are really far away, but can't hit enemies up-close, and vise versa?
I imagined instead of breakable city buildings there's instead old ancient ruins or tall crystal structures that shatter completely once damaged enough. It could help the game stand out being in this totally different world and environment vs other tank games, but it also could be easier to implement these instead of entire full-fledged buildings.
These are just some thoughts I had, you're free to take this game in whatever direction you'd like! Feel free to reach out to me if you're looking for a test player or would like to hear more thoughts from me, cheers!!