Run in Turbowarp with infinite clones o to open editor, c to close, click to add a block and wasd to move. I'll make it mobile in later updates. This is a raycaster with no image but rather it relies on grid lists which can be changed in the editor. You can't go outside due to weird outside collisions and collisions are also weird. In further updates i'll add many features like different textures, block shapes and enemies. If you want a more detailed explanation on how and why this works I would be happy to explain.
