I Am Really Cultivating Immortality.

[Please don't have high expectations, I will only write a bunch of answers] [Easy and knife-free] [No logic] [Crazy] [Bad] [Effort] [Crash] alternately. The protagonist's brain twitches, his IQ rises and falls, whether he is alive or dead. A player whose performance is unstable (it's written as a play, it's about letting yourself go, maybe it's a bit abstract...)