Beta 1.7.0

Powerups are now a thing (not just conceptually I mean they are actually in-game).
You can now have 3 saved levels.
(I held a poll on the gbatemp thread to see how many we should have but no one voted lol, so I went with 3, but if enough people ask I'll change it.)

And unlike with some of my previous projects, yes I did test multiple possible file scenarios to make sure the savefile updated properly to fit with this new version.