Arcade concept with a clean HUD design. The movement and shooting mechanics create a dynamic flow, and keeping track of the top ranks is a nice touch. Good effort on the submission!
For future polish, the character sprites feel a bit too small relative to the arena layout and grid walls, as well as some of the UI text. Increasing their scale slightly or adding stronger outlines (perhaps tweaking the color palette) would improve visual clarity and make it much easier to track the action during intense moments.