I like the concept and it's pretty funny but I do wish it was easier to aim when dropping things. Something like a shadow directly below the ufo would've been killer. Also I wish cows counted! I had like 8 cows in my train on the first crash and really wanted to see those boys get shotgunned out there!
I admire the chain of events though of the train going in the station, then the explosion, then the batteries launching out. Did you like take how many batteries were in the train and just launch an equal amount out of the back of the depot? Are their spread and angle completely randomized or are they filling up specific "spaces" you've decided?