no like ya need keys like esc., right? for the storage, settings, loot, etc. and what about the size? wouldn't it be such a hassle when the frame of the game is too small that you can't even pick your choice cuz the writings are too small?? [unless you gonna play in an ipad]
Just try it out. I added an extra button so you can use it to emulate hitting escape. Also, two-finger tap acts like the escape button too. Testers even said that Yorna looked better on mobile platforms rather on PC.