• Gameplay is fun, I got those "oh wow I can do this too" moments.
• Sound design is great! 
• Sprites and animations are great!
• Colors and visuals are little mixed, I can't distinguish mine vs them especially my main building is mostly blended. Needs outline or something to make it noticeable, especially when it's getting hit.

Looks promising in general, adding a gameplay mechanic to gathering these upgrades and items can make it more interesting.