The writing is hilarious - "Extinct the dinos. Keep at least one mammal alive. You choose." made me smile immediately, and the chibi dinosaur/mammal sprites are adorable. Unfortunately the game kept pausing itself with a "Paused while you were away" message while I was testing, so I couldn't confirm the actual asteroid-aiming mechanic worked for me - might be worth double-checking the visibility/focus detection isn't too aggressive.