First of all, welcome to The hive.
Secondly, there's a lot of details to improve. You got the concept indeed, but some upgrades might be right to make ^^
1) Translate your map into proper english, else i'll call the USA president to wall it up
2) units and spells don't have any descriptions.
3) Spells needs a certain level to be unlocked, so you cumulate skill points for nothing, it is intentional ?
4) You can use the action "Player - add property" to set up a precise food limit instead of spamming farms.
5) heroes don't have any descriptions nor what are their spells.
6) it would be good to make a sort of coop mode with multiple players, though increasing the difficulty.
7) That's not much, but each hero selection leaks one location.
8) I can't pass here with my hero