Hey, thank you for your feedback!
The game was made one year ago for the Ludum Dare, maybe one day I will come back and apply some of these improvements, the problem with the fire rate was that at that time I didn't know how to make that slow so because of that the default gun is pretty fast.
The colors sounded like a pretty good idea and I think it would be cool to give it a really colorful style and the abilities and the map are very limited because of the very limited time I had for making this game.
Thank you again for your feedback and if someday I come back to this project I will take this feedback for making some improvements.