Here is another weird thing I generated this weekend - this responds to touch/mouse by creating a topographic map type display. You can draw little islands with colorful lines. The water slowly ebbs in and out. There are randomly generated clouds blowing through. It works on your phone or in a browser window. If you are on a keyboard enabled device, holding shift will lets you "dig" back down.

https://benbrown.com/art/topo/

If you make a cool island, share a screenshot :)