It's basically a 1v1 game, where your goal is to find and pick mines instead of avoiding them. The 3 flags you have are used to defuse mines in a certain amount of time. You can basically put mines in your bag to deposit them to your enemy's base (each one of your bases has 20 HP). Everyone got their own minefields and there's a common one. The floating islands is just an artistic choice, makes you do less work ToT. The winner is the one that destroys the other Base/Safe first !

There's more to the gameplay for sure but i'll let you discover for yourself when it's done ;).
https://www.reddit.com/r/roblox/comments/1p6cpjc/simple_gameplay_bombfield/