Wow, this is such good feedback. Thank you!
I love your idea about checking movement range with a mouse over, and I'll definitely take the AP suggestion into consideration. As for progression, my plan for the full game is entirely narrative driven, including a number of different environments and set pieces. I hadn't yet considered the idea of boss fights, but I think that's definitely worth looking into. In any case, there will be events and narrative beats that the gameplay centers around.
Thanks again for writing such a constructive comment.