when i set the  difficulty after that it starts but its on full graphics and i dont have a good pc so the game just crashes 

Yeah im having the same problem and I believe my system should be able to handle it.

join the discord server, someone linked a low res config file :) I don't have the link at hand otherwise I'd give it to you :O

Link to the discord server is here: https://itch.io/t/65202/discord-server