The game is simple. First, you do a transaction, then you play a mini reaction game.
For the reaction game, there are a few random Base logos on your screen. As soon as you broadcast your transaction, you need to click the one that turns into the Flashbots logo as quick as you can.
If you react before a preconfirmation comes through, you 100% win the game!
If you react after a preconfirmation comes through, but before a regular preconfirmation, not bad - but you can do better.
If you react after both types of confirmations come through, TOO SLOW!