As the programmer of the game, thank you for letting me know. Its difficult to get the correct the correct difficultly curve for the game, so i hoped having a lower spawn rate might have made it better, but it seemed to have actually made it worse. ALso the enemies spawning on top of you should be an easy fix.

Thanks! We know about the bugs and are planning to fix those later today. Increasing the difficulty while keeping the game fair is one of our bigger priorities too