Soooooooo I've made a little more progress on Comet Compass. For starters, I've made it that cacti now spawn on desert planets. Each one gives 3 cacti blocks, as well as a cactus sapling. (Which behaves the same as a tree sapling, except it grows a cactus.)
I've also improved the lake system. They now spawn at a random Y point on the planet. Each vertical line of water blocks are also now a random length.
Finally, I also added a SpaceShip Menu. When you walk up to your ship and press "Q" a menu pops up that lists different warp options. You can fly to a previously discovered a planet, a random new one, or you can warp to a space station. There'll be several stations to visit in the game, each offering different services and items.