Thanks a lot for the feedback!
The lighting uses a directional rotating light that increases in intensity when it is facing down (sort of like noon) and a blue/gray-ish point light that always rotates over the cube but has its intensity being inversely proportional to the first directional one. I plan on making enemies more on the red side, and flickering when hit also, but after I changed to URP I had some problem using transparency + shadows. I got so used to the way the game worked that I didn't notice enemies became harder to see.
I'm still trying to find some balance in spawning, the idea is that 6 will always be harder than 1, but it ends up with 6 kinda insane as you are forced to run away and 1 most of the time spawns an item and you gotta wait. About the base gun, I was planning on making it double once you upgraded it, as if dual-wielding (and perhaps adding a third one that would be like a drone shooting from above the player's head!).
I planned on adding a timer effect that warned the player the last 3 seconds before die rolls, with simple clock ticks. Currently it rolls every 8 seconds after player steps on a side, what do you think of a special enemy spawn that once killed activates the roll (with a 3 second timer)?