If players are known, it would be cool to keep score. Every cache or answer type could have some sort of scoring table associated with it. Getting an answer right on the first, second, third, ... try could earn the player x, y, z, ... amount of points. There could also be an element of time involved: either between checking in to the cache and getting the answer right, or between onboarding (starting the game) and completing all caches. This data could be used to generate a live leaderboard and determine a winning player.
If players are known, it would be cool to keep score. Every cache or answer type could have some sort of scoring table associated with it. Getting an answer right on the first, second, third, ... try could earn the player x, y, z, ... amount of points. There could also be an element of time involved: either between checking in to the cache and getting the answer right, or between onboarding (starting the game) and completing all caches. This data could be used to generate a live leaderboard and determine a winning player.