Nice work! I like the neon style, I liked how the music changed a little with each level, the upgrades were a nice touch, and the depth charger felt pretty good to take out large crowds.
This is just my own personal preference so it’s not really a criticism, but I think I would have liked a bit more enemy variety to keep the player from just kiting. Not necessarily adding attacks, but maybe something like an enemy with high speed but poor acceleration could be an option so that the player has something to actively dodge.
Overall, good job on your entry 😁