This is technically quite impressive, and I think it's a solid foundation for a game. It feels like an interesting retro and psychedelic experience. However, I'd point out two points of feedback:
1. Some people found the narrative lacking empathy, and it definitely made a point that offended some people. You can deffo work make it a bit more humaine for the future, but I understand the satirical notion of the game.
2. I'd say a good improvement for the future would be having more feedback to the player, such as sounds when you hit an enemy, or having a health bar.