Why is the project not building correctly in Unity?

Question

Android

There is a project with a game on unity3d. On stage, everything is fine, everything is cool. But in the assembled game for android, for some reason, the sounds sound different and sometimes with slight delays. On some phones it is not installed at all (android versions are suitable). And when assembling a universal application for windows 10, everything is cool on the PC, on the phone some textures are somehow floating, on the tablet there are strong lags, although the task manager writes that the game does not load it. Why is it so strange that everything is being built, where to look for the reason? Tell me)
Good textures:

Bad textures: