I'm trying to do a menu with Options (e.g. what do you want to build/upgrade, ... ).
If I understand how it works, I would like to include some submenu.
e.g:
Player has several icons (buildings/empty spaces).
Click empty spaces: what do you want to build: Hotel, shop, Airport, Military, ...
Player choose Military: what do you want to build: Airport, defence, Radar,...
Player choose Radar: Radar will be build, thank you, go back to menu
or
Click building: you choose Radar
do you want to upgrade, destroy ?
what do you want to upgrade ?