It was a fun game to play! The visuals and sound are good. I think it would be even better if there were some small animations showing the heroes or creatures carrying out their missions. Adding more details about each mission would also help.
In the future, you could also give each character their own face or unique appearance. I think that would give the game much more personality.
I didnāt really see the connection to the theme, though. Overall, great idea keep it up!