It seems useful overall but has areas where it could improve. The UI is inconsistent. Inserted art just appears in the "board" but insert shapes require dragging in the board and there's no indication what shape you're drawing.

I could see no obvious way to set outline/stroke width or color for shapes even though art in the library show those properties. There seems to be no way to rotate shapes. There are no line or text tools.

Of course, your art library isn't fully populated yet. For instance, search for "dog", "bird", "dragon", "knight" all return no results. Also, even though the search tool asks for submitted art, it wasn't at all clear how to submit it.

Anyway, the idea of sharing and collaborating around images in a simple environment is appealing. With a few tweaks, it would be something that I would use and recommend.

Wow, thank you so much for this comment; I really appreciate it, and this feedback is immensely helpful. Thank you!