Yeah I'm pretty new to unreal optimization. I think what I'll do is make an option which turns off the atmospheric light reflection because I think that's what causes some computers to struggle. Thanks for giving it a play! All the props to the look of the game goes to the 3D artists!
if you could share your computer specs that would be of big help (if you don't mind ofc). Seemingly higher end computers are struggling while lower end computers are running it fine?