Bevy

I added more changes to Bevy with Garrett's help: An end-of-level results screen and a stage rank.

Background info on Bevy: Early in the making of Bevy, I was the only one responsible for programming, importing assets, coming up with some of the game mechanics, and the level design. The "root" of Bevy was a horizontal shooter I made by converting a vertical shooter from a tutorial. At some point in the project, I asked Garrett to help me out with all of these because I was getting overwhelmed.