The tutorials are very helpful, however I am stuck because I have no background/sprite/environment design to begin creating the game. Any ideas on the best process to get some created?
You can upload your own theme assets. Go to the menu and click themes to create a new theme. There you can upload jpg, png and svg images. You can make those pictures with any art tool. Ranging from free drawing like Krita and Adobe Photoshop to art tools like Kenney's Asset Forge.