Hey Rompkins!
I'm sorry for that the game isn't playable :( I think it likely has to do with the real time lighting going on everywhere and the draw distances. Clearly my models aren't very high poly! (lol). HDRP seems to have steep system requirements : https://docs.unity3d.com/Packages/com.unity.render-pipelines.high-definition@8.1/manual/index.html. Let me know if for some reason you think that's not the problem and I'll delve into it a bit (or make an option to adjust the camera draw distance :)).