Basics
Its basically a custom mode dream did where you are in a 500x500 border and have 1 person trying to tag the other. If you get tagged, the person who tagged you, gets a point. Best of 3 or 5 rounds.
Monetisation/ Cosmetics
It can easily be expanded on by having custom maps, abilities that the tagger can use such as going invisible for a few seconds or abilities for the runner such as dashing or getting a 1 time use ender pearl. You could also add traps and other items of use. This allows for item rewards and other items that the hive could montesize using.
Conclusion
This game is friendly for mobile, PC , Xbox and other platforms as all you need to do is sprint. I think it’d be great for challenges and other stuff for content creation.
There could also be different modes such as Being able to build, No abilities and others