Welcome aboard, and nice first game attempt! Even if you didn't quite get the references part, I'm glad that you enjoyed being part of it!
- I like the chaos effect mechanic, I think it is a cool way to liven up the classic top-down shooter -- I do think it should be faster though!
- I was playing on an ultrawide monitor (2560x1080), so the UI felt pretty big and crushed together.
- A crosshair would help for aiming, especially if you added other weapons in.
- Enemies beyond a certain boundary, if I got far enough away, would stop trying to move towards me... is that intentional?
- The music was a nice touch. I'm a fan of the main character, too... I see you have good taste in combat assassin types too, huh? Reminds me of a certain hitman and a certain metal gear enjoyer...
In all, not bad for a base! It could be fun to expand on it, add objectives to the world, more weapons and characters and possibly even world-changing effects as time goes on and the chaos timer goes down.