So a void map that you have infinite blocks on and you have to keep bridging or you lose? This sounds like a worse floor is lava game (If you wanna check that out here it is).
Anyways you need more details on how the game works,
Not enough information to understand what you are suggesting. Is it 1v1s? Do you knock the other player(s) off? If its just first one to stop bridging without being able to have any type of pvp then it seems like a boring game.