I added wormholes, which are currently just a glowy circle that you can touch to travel very far, instantly. These will serve as “levels” in the game. Defeat the boss, a wormhole opens, and you can travel to the next area. But there’s no hard requirement that you have to do it that way. You can just fly from the Earth to the Moon directly if you like. I think it’s cool to have the fully open-world option as a different way to play the game.
Try it out in version 0.5.3.0.