Changed to HTML5

Originally, I knew it would be a pain to have people download the game to play it, but I made it a downloadable anyway because I was afraid to mess with Godot any more. I just wanted to publish and finish the freaking game. Recently, however, I've been learning about building web apps, and I was feeling brave. It turns out that exporting an HTML5 game from Godot is a piece of cake for me, and now it's easier for people to play. Yay!