Great game! It could have been a pretty repetitive game but the fast-paced, chaotic nature of the gameplay keep it fun and engaging.
Like some other people have said though, the building part of it is not as interesting as the first part. Or maybe it is, but it's just too slow compared to the opening. If you had mouse support for the building part it could have been much faster and so you can get back to exploiting employing your workers quicker.
Very nice writing as well, but I though the font choice is a bit difficult to read. Also on the dialogue box some texts just disappear when you skip it with K, instead of displaying them instantly. So that part didn't work consistently.
Overall a pretty solid entry though. Good job!