How to reduce the system requirements of the game on Unity3d?

Question

Game development

Hello.
A small project is created in Unity3D. The question arose: is there any way to reduce the system requirements of this project? If so, what restrictions would this lead to?
PS What to do in such a situation (they themselves are not happy that these computers also need to be supported)?

Answer 1

Decrease working resolution
Decrease texture resolution
Decrease number of textures
Decrease 3D model detail (including using LOD)
Simplify shaders

Answer 2

You seem to have Win XP. She was buried back in 2008. Put either 7 or 8.