That was awesome! The music and atmospheric sounds were very fitting, and the gameplay was entertaining, the upgrades giving a nice sense of progress, while the enemies spiced things up enough to keep it interesting! Though the tunnel did start to get very long at the end, a sprint speed upgrade would've helped a lot with that. The base movement being upgraded was good, but it still took a while of just sprinting mindlessly to get to the end and back c':
Oh and before I grabbed the last thing I went back to read the oxygen saga, worth every second of sprinting, RIP Planty </3
And what an ending, that was pretty intense! Colour me very intrigued 👀