This version is for Maxpain3994's contest. The main verison is https://scratch.mit.edu/projects/585046481/. That version is the only one that will be updated (i.e. This version will remain v 1.1.3) Use the editor to place land, lava, start and end blocks. Use air to erase anything. Note that you can only have one start and end point. Click play to test it and edit once you're done. Make sure to press the info tab for more details.
Thanks @Maxpain3994, @CarazyGuy3999 and @junebeetle. Go follow all of them right now (after you've played the level of course)!