level 11841 on up... bloody hard as hell, none of the pieces seems to be working for me and I'm using up an hour of life to pass a five levels... don't know if it's me or if I'm losing my touch
I finally got through it with a UFO and 10 ingots, but the next one is similar and my resources don't allow me to continue, at least for now, to buy. I give myself some time and I will return the game I love this. I encourage you to continue playing