I'm not absolutely certain how I'm doing it, but I'm most likely going to have seperate j2ls for different points in the story. The main concept is that you can go back to other planets even if you've been there already, and they'll probably have different missions or something. I'm going to fine-tune it so it doesn't use too much filespace though. The jungle level is the only thing that's really finished so far, and the ship level is a tad rushed at the moment. The second screenshot is supposed to be zoomed-in on the little control panel in the ship. I'll fix it, though.