Unit upgrade and bug fixes test

@murrayk012000 Here's the code I was talking about this morning. The new issues that popped up when I forked a new repo were: prefab for BarRed was missing. HudController for each level scene had UpgradeBow button instance for the UpgradeSword game object. and "You Won" message appearing immediately when you select the first level in the level select scene. 

I fixed all these issues, but I am a little concerned whether the issues were already there or were somehow a result of me deleting my repository. If the issues are just on my end, we can just delete this branch. Otherwise, we can merge it into the master.