Added a few things to editor, also fixed bugs

Yes! You can delete stuff now! Lol. In the level editor, of course, not any pre-made level, that would be way too op on most levels, xD. You can't delete the player, though (that would be game-breaking, lol, considering you can't re-add the player, haha). Everything else you can delete. Just press "backspace"! :D (While holding it, though, which you can do already, lol.)

I also fixed any bugs that might appear, such as one where if you had the camera on, played it, then moved left and right, it would still follow the player! :O That is fixed, though, since that is way too weird, lol. I also fixed another bug where the Exit Adder button would be enabled if you already had an exit then played the level, then came back. You could make more exits! :O Those exits aren't functional, obviously, they are just fake. Although I guess you could have played "choose the right exit or die"? Though that is not the purpose of the level editor and the game, xD.

Also, the best feature of the level editor so far: saving and loading! You can save the level to your save file and then load it back! :D If you are confused about how to do so, you just have to type in the level name. You can change a level's name by renaming it. Note that if it has the same name as an already saved level, it will override it. I will add an option to see already saved levels and then delete them so that your save file doesn't start filling up with test levels or dumb or stupid levels made out of fun, haha.