I love how they give each other a lil' kissy to resolve the conflict. Ok maybe it's not so little, that's a big-ass smackaroo. The sound effects and music/ambience combine wonderfully, and the art style is a good example of how minimalistic drawings can look great.
Try to press the upgrade buttons when you don't have enough money for some bonus sfx :)
EDIT: I went to make lunch and the screen was black with conflict bubbles when I got back, that was unexpected haha