Direct answer
Use a glove to slap opponents, earn slaps, and unlock more gloves. Some abilities are passive; others use E, while mobile players have a button.
Start a match with one glove
Choose a glove, enter the arena, and slap other players. The official Slap Battles description calls out different gloves with unique abilities, so learn one glove’s behavior before treating a community recommendation as universal.
Earn slaps and check inputs
Slaps earned by slapping people unlock more gloves. Some glove abilities are passive; for activated abilities, the official description names E and says mobile players have a button. See the gameplay overview for the evidence boundary around values and advanced strategies.