Have fun creating a giant 3D line in this game! This was a relatively quick project, but I'm glad that I got it done and that I'm able to post it. To make a line, just move your mouse around. At the bottom, you can see your whole creation in the form of a mini map. Hit the "e" key to erase what you've made.
Code is all me. Everything was made using the stamp tool, something I've been using a lot lately.