I am definitely going to save this for a day when the internet is down! Lovely idea and well implemented. You should definitely continue fleshing this out, hidden item games are super popular and the 3D interaction could give you an edge over other titles! The different themes could be an option for in-app purchases and I know you'll have a lot of fun designing new themes and maps. While playing, I also struggled with the mouse sensitivity a bit, but that's an easy fix for later.