Great music and visuals, a lot of content and a cool theme. It can be quite frustrating and the controls and enemies feel quite punishing. There's no visual distinction between the green sludge that speeds you up and the green sludge that instantly kills you. The final boss fight in particular feels insanely difficult - why do I have to shoot a specific spot which is perpetually behind terrain? It could also really do with a health indicator so I can see if its even still possible or if I should just succumb to the sludge. All that being said, I played this game a lot despite the difficulty and when everything lines up the game is amazing!