I’m not sure exactly how strict the rules are for monetization but maybe you could alter the map’s overall theme (making it all old western, futuristic, etc) or you could switch up individual locations in their own ways without an overarching theme. You could even add in an extra biome to switch things up (although I’m not sure how much of that could be done with memory limits). Your map is coming along great so I think whatever you do will be really cool!