The music is really good, it's a banger, I gotta say that your friend of yours is really good at music. The visual effects are really well made and satisfying it would even make it better if you gave them sound effects, the metallic textures makes the game more unique.
I cannot see properly where the enemies are, the character is blocking the middle of the screen, you could put the camera more on the top. The game over screen that tells you are dead, it doesn't allow you to move the mouse, (maybe you didn't put the mouse Lock code properly), and aparently alt-tabbing fixes the issue. Attacking could be improved, i'm not sure if i'm hitting them, maybe a small particle effect could tell you that you are doing it properly.
(I'm sorry if I'm being too harsh on you, criticism can be taken in different tone and perspectives and I hope you could understand that destroying lifes is was never my intent, I liked the game and I would be happy to see you improve).
A small improvement maybe you could make the player take more risk if you give them health every time they kill instead of making them wait for 7 seconds, it would make it more engaging. The enemies are kinda camouflauged with its enviroment, I'm not sure if thats you intention, but it would be better if you gave them a slightly different color to tell them apart easily.
Overall, I can see it improved and have even a better experience, I wish you a happy development journey!