My cat likes to jump out of random places at random times and scare the hell out of me.

CodeParade, he made a game called 4d golf. He does videos on fractals. Stuff in computer science and math in general. He also made a game called marbel marcher where the environments are 3D fractals. Link to his channel: https://www.youtube.com/channel/UCrv269YwJzuZL3dH5PCgxUw