You game description cracked me up. I want to say I did my best to avoid bumming people out on the way to my bedroom, but on my first run I just wanted to destroy everyone to see if there would be a different outcome. It was fun and my guess is you'll have different end-states and scores in a bigger build (if that's part of a later challenge), but for a short prototype I enjoyed it.
I thought your art was nice and the color palette was a perfect choice to match sadness. My small critique is I think you could have used your character art and done some small changes and color swaps to be the NPCs instead of big yellow smiley faces ... I like that the smiley faces are a quick read and easy to understand how they're feeling, but they felt a little out of place with the other art.
Overall, great work.