Ehm..incorrect, you can make the screen move in the puffin browser, but it took me some time to figure it out too, so here it is:
On an i-pad you can just slide the screen. Though I find it works even better in full screen mode. For typing and mousework, you need to call down the menu in the upper right corner, or in full screen mode in the lower corner for the keyboard.
The menu has the ability to show a mouse or trackpad and a keyboard. Chatting works fine on an i-pad.
On a cell phone you can call up the mouse and trackpad by clicking on the mousesymbol (lower left corner) Sliding the screen can be accomplished by sliding your finger over the trackpad.
For chatting, same to call up the keyboard by clicking its symbol (lower right corner) just remember to put the cursor back in the chatwindow, it sometimes disappears from there.
Visiting works, but especially on a phone it tends to be slow work to find the 'right building' due to the small screen and all the dragging/sliding one has to do, so when Im using my phone I just click the main hall. In that case I just leave the chests, but you can find them if you want to.
And yes, its bloody fast. If it ever gets a pc version Im going for it