It's a pretty buggy game.

The first thing is that **when the number goes to 0, then it will go into minuses.**

The second thing is **the support with the red box doesn't have a collider.**

I'm guessing you used the **first-person shooter player controller** for the player which is kind of a bad controller.

Maybe leave some **hints** on what to do when getting an object. Cause I was really confused on what to do next when I found something.

That's all I found and what I think should change. Your game has potential though.