I had a similar issue, I don't like to play the monster because there is so much destruction all over the real world so I will try another approach.

Your game, on the other hand have a chance to be alive after all.

What if...
Instead of bringing light to the world you decide to invade o bring darkness?
Mechanics could be the same and you can change back the main purpose of your game after the jam is finished.
That way you will work only once and you will have the chance to participate and also have your Settlers game in the GB.

Hey, sure you can still submit, and actually be eligible to prize, just beware that one fundamental part of the ranking is the “interpretation of theme”, which if absent will award 0 point (but just in that category, the rest are ranked as normal).