Thanks for trying out our game! :)
A quick note on the gameplay: although we included a short tutorial to explain the basic mechanics, we realize we should have made it more intuitive. Structures can be upgraded or repaired by left-clicking on them to open the interaction menu; you can also right-click to deselect them :) In future versions of the game, we plan to improve both the UI and enemy balancing.
In any case, thanks again for giving our game exposure with your stream; we really appreciate it!