Heaven On Jupiter

I made this in a few hours, it's just a very rough prototype. But the goal is to have infinite planets with different procedurally generated environments for the player to explore. I've made another project with artificial life and evolution and also want to work in complex evolutionary systems into each planet. 

So far I have some alien looking plants that are generative. I'm using L-Systems to render the plants and it's working okay. If you have any feedback at all it would help. For instance, I'm not too good at art, how do I make it look more "top down"?