Thanks a lot for the detailed feedback netravelr! You're absolutely right about the apps — my original plan was to start with no apps unlocked and introduce them one by one. The idea was to push players into a "blind treasure hunt" first, then give them tools as they progress. But I really underestimated how hard map design would be, ran out of time, and just unlocked everything at the start. Glad you saw the same thing I was going for!
The phone-off idea is really clever — switching between saving power and checking info could be a fun layer. And yes, a prompt at charge points is something I'll definitely add next time. Several people mentioned the same thing. Thanks again for playing and for the great suggestions