I like the mini-RTS idea, and a different control scheme which is about using a horde of guys. This works really well!
It seemed a bit hard for me though, as I could only get a few guys and there were a lot of enemies. Your troops also died quite quickly.
I also had a slightly weird thing where the edges of the screen were a bit cut off, but that didn't affect things too much.
But this is a really cool concept, and I like seeing alternative ideas for strategy games. You should polish it up and expand it!