Game works in editor but performance is bad or doesn't work in built project

When I played the game I made in the editor, it ran fine. But when I export it to windows, the menu and the watermark scenes worked fine but when actually playing the game it the performance is bad or nothing is happening except for the updating of the UI. Please help.

Footage of gameplay in editor

Footage of gameplay in built project (Windows64)

This could unfortunately be so many things. Try learning how to use the built-in profiler :slight_smile: Unity - Manual: Profiler overview