WASD to move. If you get a bad world, meaning you are over the void, or have nowhere to move, just click the flag again to generate a new world. The Gobi, the spiky dinosaur, is called a merchant and just sits there, vibing. You cannot take his spot, unless you spawn on top of him. :( Oh, also, if you put your mouse over a tile you get a surprise. (:
I got recommended a video by Jordan West about Isometric Coordinates; this is where my inspiration came from. Highly recommend checking it out, as it is very interesting. I also used Griffpatch's tutorial on sprite layering for the merchant and your character.