I love survivorslikes with twists! This is a really neat idea and a good prototype. It was pretty fun to play, although around the 300 second mark things started to become a bit choppy (I’m guessing because of the number of enemies) and the FPS was in single digits at around 350, and I died around 420 (heheh) as the game did not register most of my inputs.
Nevertheless, this is definitely something that would worth spending some more time with, the “on rails survivors” gameplay loop is a really fun one!