The overall concept is great! I like the concept of just shooting at monsters while going through the corridors. It suits the theme really well as well however as the other person mentioned, it doesnt tell me why, when or where the gravity is changing so its a bit confusing at times. The aesthetics is great! I like the retro aspect of the game. The sounds could use a bit of music! A tutorialisation of the game at the start would be super helpful to understand the game more at the start! Overall, great job!!