Icons way too small on advanced levels.
As recommended by the creator, I bought the biggest iPad I could afford, which they assured me would be an appropriate size. (The next size up would have cost over $1000.) Even worse, if you miss even one icon choice out of the 48, you have to reopen every icon again to reread the description in order to discern which one you may have inadvertently missed.
I’ve done multitudes of these exercises on paper, as part of my therapy. Those go extremely quickly, as I’ve never found this exercise to be difficult. This becomes incredibly frustrating and I hate both how much time it takes and how much effort and energy must be expended in order to complete. I wish I’d never bought this app, for this reason.