Hi, thanks. :) At first I thought of making a desert in the morning but at night looked really good, so I changed my idea. Yeah something wrong with the background that I couldn't solve it, I have an idea of what might be, I'll try to fix it.
The first radioactive gas I've had a problem with it too, I guess the speed isn't enough. That's why I made the mid-jump, I thought it was solved, but this problem just happens a few, I'm gonna adjust the speed. I just don't want it to be too easy also hahah. Thanks for the feedback, I enjoy reading the comments.