I love the concept. In the past, I've taken part in many communities and forums that had an immensely positive effect on my progress in learning to design graph

I love the concept. In the past, I've taken part in many communities and forums that had an immensely positive effect on my progress in learning to design graphics and music. One thing you can improve instantly, that will probably reduce the bounce rate, is the landing page copy. Make it very clear what your product does. Otherwise, I think you may be limiting the users and yourself too much by enforcing the time-trial and web-based drawing tool. It's probably quite engaging for those who dig in in front of their PC with a graphics tablet in hand. But it didn't work out for me on the MacBook trackpad or the iPad. If it was my MVP, I'd just let people upload the image -- no matter how they made it -- and focus on community building. 9 times out of ten, the thing that helped me improve was advice from a peer or mentor. You want to have an environment where people aren't scared of posting because of unsubstantiated negative reviews. But you need to have members that are capable of constructive criticism. Otherwise you just end up with praise and flattery, which belongs in a showcase more than it does in a Practice Engine. Goood luck! I'll take another look at the app when I'm at a desktop computer.