BEHOLD! My army of ghosties will smite thee!
This game has an almost meditative flow to it. Can't imagine that's been said many times with regards to lopping off astronaut heads. I appreciated the train and bombs occasionally forcing me to move a little more creatively. If you take this further, I'd love to see more quantity in types of or frequency of hazards continuing to thwart me. I also really wanted to hyperscale my ghost army to epic proportions, but they disappear after taking one human (for balancing, I imagine). Thought I'd share that desire nonetheless.
Keep on creating!