Playability:
Unable to run the game in the browser unfortunately. That's ok though don't lose heart and keep making things. Tried in both Chrome and Firefox.
Theme:
Based on your design doc this fits the theme well but I would love to see it in action.
Cleverness:
Tying power to audience participation is a good move and feels right overall. Would love to see this expanded to powers as explained in the games UI.
Artistic Style:
Simple and consistent art style from what I can see.