Thanks for the feedback. I have been wanting to add a downloadable version and saves, but it would screw up once I added the city, because when you updated, if I kept you on the current level, you would skip the city, but if I send you back to the city you may have to replay levels. I will add that after the city level is done. I also like your volcano level idea but think it would be cool as some kind of tech world with a star energy absorber. The falling rocks could be chunks of hot metal, the lava bubbles could be solar radiation bubbles, the area where you heat and need to get to the cold could be an overheating server room, it would also make more sense for gears and pendulums to return in a machine setting, and lasers would fit perfect in a tech world. This could also explain why the ice world is so cold due to all the nearby stars heat energy being absorbed.