i have no idea what game engine your using but try a different game engine like unreal engine 5 or 4.28. you need alot better graghics to pull off this concept i love the idea that your shooting for but you need better graghics to pull off this concept. another advice try to stick with one pallet color selection as you dont want to mix those arounds and keep a steady theme of concpet design going all around these do play a major factor in how the over game looks
Best regards
-DragonStorm.llc