Otto's Tennis Game is a sports game where up to two players play short tennis matches. You must time your player's jumps to hit the ball with their racket. The twist is that you control your character's movement with only one button.

You play by tapping a button to jump so the tennis ball bounces off your racket towards your opponent. Repeatedly tapping the button makes you fly higher letting you reach the ball when it's normally out of reach, and landing the ball on the centre of your racket causes a turbo shot. You win points when the opposition fails to hit the ball back, winning the game when you've scored four times with a two-point advantage just like real tennis.

The game features a single-player mode, with either casual or robotic difficulty. This provides challenging gameplay without feeling impossible. You'll need to have fast reactions and rapid button tapping button to win points against the harder difficulty.

This results in a simple tennis game which is easy to pick up. Otto's Tennis Game can be either a casual two-player minigame or a trickier challenge against the computer.