Love the game ideas, this has a lot of room to grow! Looking forward to if you push further updates.
Love the menuing system for the characters, but it is a bit unclear at first, maybe some info screen before everything starts.
Not positive what to do at first, but makes some sense after a bit.
More things to build would be a great place, also maybe messing with some tooltips on what the different buildings would help with the first time they are bought or about to be used or unlocked or something like that.
World feels quite big, but you can see everything, maybe a fog of war?
Location of your units and base on minimap are unclear
Again awesome work, would love to see this pushed further.