I played around with your game for several mins.
I'll start with what I liked:
- the art style of the stages and also the characters as well
- Unique characters. Each character has a unique moveset
- Good customization options with the weapons
- Good controls for controller
Now for the things which could improve:
- Keyboard controls could be mapped better, especially for multiple players on the same keyboard.
- There should be an exit button on the main menu
- It would be great if you could customise player controls from within the game ie so you don't have to quit the game to change it
- Should be ability to customise controls for multiple players on keyboard
- The intro which shows the inputs on the controller could be removed and the perhaps shown in the options menu.
- It would be nice to be able to stop the game and go back to the main menu while you are in a match.