Well umm... I don't know where to start. I had trouble with the controls, mostly because there was no basic "Control Key" To find out what each key does. So I basically just sat there smashing buttons till I figured it out. You should have an enemy health bar (Sorry if there is one, it's a bit confusing). It's an okay game, I'll give you two stars, keep tryin on it, it could be great.
I liked it, took me a while to figure out that I always need to be digging pretty much. After I got that down and won some mana it was smooth sailing. I never lost any health and ended with 10,000 and scored 62,000. I don't see how you could improve much, maybe some more defenders. Oh, and you should be able to see their attack range before you put them down. But you get a 5/5 from me.
Impediment, first shoot the thing that holds the window up for the guy in the crane, than shoot the oil, then shoot the left line that the thing hanging is attached to.
The end.