How much bigger is the full game compared to the demo? I know there are three more levels, but are they similar to the first two, or is there more new content in the game currently? How much more? :)
Right now the full time isn't too much bigger then the demo. I'd suggest holding off if you're seeking a lot of different content in the game. Purchase the game if you want to show immediate financial support. But right now the difference is some more art from lore entries and a boss battle.