I am genuinely ecstatic that you played that long and also so very terribly sorry! I had no time for much testing and direction (cramming certain specifics in my long game description doesn't help either. I did add a patch for spawn points after each of their 'tutorial' areas they start in, so even if one creature dies, any creature who made it out of their spawn area and into the main room now spawn back there. I could probably add checkpoints after each lever gets pressed but I don't know if I'll have time or energy for that. We'll see.
But thank you for all of the feedback I appreciate it. Lack of player direction and checkpoints seems to be the major pain points here so will take these into consideration.