To the app makers – iOrnament: draw mandala & art Review

I love this app, works great. Best out there, but here's what could make it better. When drawing, the drawing "surface" doesn't have to be so big. When trying to undo more that 4 inputs At a time the program freezes. I never have to zoom out so far as it allows, I think making the surface smaller would stop lag. Also the ability to have more than 3 layers would be great, also the ability to visually isolate layers/ name layers etc. lots could be done with layers that would improve intricate design making ease.
Review by WiseFarmerJoe on iOrnament: draw mandala & art.