I have, but not a ton. I like the graphics after an initial period of getting to know them. I wished there was some manner of instructions... but at the same time, the whole thing is about diving in and just seeing what happens, so I also like the lack of instructions.
The PC version has a whole illustrated instruction manual, but I figure mobile users don't care about that. Maybe I'll have a brief set of instructions accessible from the menu then. Basically they would say 1) Here is what you are trying to do. 2) Here are what the buttons do. 3) Here is what the menu contains.
The graphic style mostly stems from my limited abilities. I know that it isn't ideal.
From a technical perspective, I seem to have trouble getting the action button to work. The one on the right. I'm on a Sony Xperia Z running Android 4.2.2. (Seriously? Man, I need to update my OS.)
Interesting. When you press it, does it not do anything, or does it trigger the left button instead? How frequently does this occur?