This game felt amazing to play! The physics feel just right, and defeating enemies is incredibly satisfying, whether you're shooting them or simply running into them. However, one major issue I had was that there was practically no anticipation for certain events - without warning, enemies would spawn immediately in front of you, and also it was hard to judge when the cube would change colors. It's not the randomness that's the problem, it's just that you have no indication when and where said randomness was going to happen! Adding a spawning animation for enemies would help tremendously (it wouldn't have to be fancy, just having them flicker for a moment before becoming active would suffice). As for the cube, giving it a visible timer (or maybe even having it sync up to the beat of the music) would have made it feel a lot fairer!