The default Linux renderer is Vulkan, can cause issues. Found a fix.

Hi. This is a message to the developer(s).At first, thank you for Linux support. I bought the game today and had a strange issue. When I started the game it ran at 100 fps then went quickly to 20 fps. I was unable to find the cause so I turned on the Nvidia overlay in Nvidia drivers (nvidia-settings -> OpenGL Settings -> Enable Graphics API Visual indicator).It said the game runs on Vulkan. So I tried a little trick. I set the launch parameters to "-force-opengl" and guess what - the game runs maxed out 200fps.I think this information might help you to fix these issues with the Linux build. I saw a similar problem reported here - https://steamcommunity.com/app/506500/discussions/1/1488866180601421946/?ctp=4 If you need anything (testing, more information or anything) let me know :)This is my HW and SW:MSI Laptopi5 7300HQ24GB DDR4 2400MHzNvidia GeForce GTX 1050 Ti with 410.66 driversArch Linux x64 with Gnome Shell desktop environment256GB NVME M2 SSD + 2.5" SATA 480GB SSD