WASD or arrow keys to move your paddle first to 10 wins to adjust difficulty either use hotkeys 0-9 or use the slider. press m for automatic. when you're about to win, it switches to 0.1 the lower x is, the higher the difficulty. the default value is 0.35 the lowest I've been able to beat is 0.16 if anyone can get one shot past 0.1, they're the GOAT
note: double click the green flag when restarting