Nice game! Controls are nice, I love that you can zoom in and out of the map! The gameplay is also good. Being able to build towers and mine resources is really fun :)
Points for improvement: I think connecting the nodes adds needless baggage to the game, you could easily just place the nodes in a limited radius around the area you've already captured.
By the way, do I have health? On my first run I was just waiting to die to restart, but my death never came.
Good game overall! Would want to see this polished even more! :)