Bought it and played with it
The movement seems somehow to be a lot smoother on my itouch than it is on my pc, though it equals out with having to use the directional buttons on the corner of the screen.
As for improvements, players I found whom were actually new to graal and playing on their Iphone/pod didnt know what to do. Everyone of course had fun killing each other, but upon looking around, its actually a rather boring and empty world :P Maybe add options to make the arrow buttons invisible, a small button on the menu that would show you a list of emotions you can press and use ( I found myself thinking to myself "Crtl-d! Drtl-h!" but had no way of using them ;_; )
Also, had to upgrade my ipod for this. Was enjoying the 2.xx FW with it being jailbroken. The 3.xx fw's are a little more buggy, so I hadn't upgraded before. I'm willing to guess that a lot of people are still using the 2.xx FW and that they wont bother with the app with the required firmware :o