Good pixel art visualization in a retro game style, but:
- It's unclear why the controls are entirely on keyboard, but in the shop they switch to mouse. I think it would be better to choose one approach: either keep the in-game controls on keyboard and make navigating the shop positions also use WASD or arrow keys, or put shooting on LMB (which is simpler)
- It's not very clear whether there are permanent upgrades in this game. I think they are necessary for the player to feel progress (of course, if this is an arena concept game, then it's fine as is)