Fun game with a solid concept! I enjoyed playing it :)
For the visuals: For me personally, a low res pixel art style with some 8 / 16-bitty sound effects would've fit perfectly. Also, the Black - Neon Blue contrast is really exhausting for the eyes. I turned off post processing (thanks for including that setting!), but it was still quite intense.
Gameplay wise: I think the upgrades felt alright, but didn't really make me wanna grind more to see their effects, if you know what I mean. Some more unique unlocks would've been great, like: - being able to slightly steer the ball after shooting it - some way to make more money (passive income, higher chance for money to spawn, gain 1 $ per 10 m traveled etc)
Overall a fun experience, good job!