I don't know if it's just on my Computer, but Sumo right now isn't working.  Queeky is though. so we still have some design studio to design things.
Hopefully they are working on it. I just googled about Sumo Paint and others are having the same problems with sumo.  This has happened before and was 
eventually fixed. But here is a link for a sumo paint that I found. Just scroll down a little and it will appear.  https://www.sumopaint.com/home/