Many objects in the scene were not meshes but rather particle systems, including textures as I mentioned in the comments below. The box textures were also created using a particle system (sometimes I refer to it as a particle system, but I also mean VFX graph). I'm glad that you wrote a detailed comment; I also have some aspects of the game that I'm not satisfied with, but with limited time, there's only so much I could do. I'm happy that people are taking the time to play through all the levels, and I hope they find it rewarding.