Potions on adversary challenges
I think the way selecting potions on adversary challenges should be changed. If you don't click exactly on the potion it sends you back to the fight. My phone isn't exactly precise detecting the touch and I keep losing fights because I try getting the health potion, don't click exactly on the potion and get thrown back to the fight where I get killed.
If I'm close to win I don't use the health until after I throw my spell in case is a a critical hit and the fight is over. So losing when I'm just one hit away just because I misses clicking the health potion for one milimetre is frustrating.