Cool little game. Very nice Graphical Assets. The gameplay is simple and easy to understand.
Balancing: If you just spam workers/miners (50g) and ignore the first wave of enemies until your outpost (the little tower) is destroyed you can easy snowball on the enemy.
UI: I would love to see how many miners and active fighters I have in total. Maybe as a number in the corner of the icon of the unit. Also HP-bars would be great. Having some statistic about how much gold was spend in total, unit death count and gold per minute would be great as well.
Keep up the great work Thetra would love to play an updated version!