Draw your character, then platform them around on a basic map. Arrow Keys or WASD to move. There are also mobile controls. You can save and load your drawings, and you can post them in the comments. (you will probably have to use more than one comment due to the character limit) or you could make a project or something for the code if it's too big for that. I put the code for Permafrost in a comment in the backdrop if you wanna play it.
I found this in my unshared projects. It was broken, so I took some time to fix it up, add a simple map, and make a saving system. Complex drawings run better on Turbowarp, and look better with high quality pen: https://turbowarp.org/836121168?hqpen