Dev needing ideas for custom SG

Hey guys! I am trying to get myself as a dev out there, I used to run a 50+ player server with the simple survival games plugin, but it fell apart shortly after owner disputes, now I am thinking about starting a remake back up, I want to program a new survival games plugin to give players the most fun experience, if you have features you have yet to be seen please comment, or if you have a better minigame feel free to post, thanks!