Also reminded me of Pinata.
However free range. Where Pinatas could interact with each other and their environment without required user intervention. That reminds me more of Black and White.
Was wondering how easily this kind of UI could be integrated into the CryENGINE 2 Sandbox editor.
Imagine anyone being able to create landscapes, drop in fully dynamic physical objects, then easily code AI (at least with Boku the AI is made even more simple than the out of box CE2 tools.).
Add multiplayer and it could make a standalone retail 360 title at least as compelling as Pinata.
Something to stand against Little Big Planet and just different enough to not be a direct ripoff.