Tap to make your slime jump and bump the ball over the net — your slime auto-tracks the ball but the timing is yours.
Your slime is on the left, the opponent is on the right, and the net is between you. Your slime auto-walks toward the ball horizontally — you only need to tap anywhere to make it jump. A jumping slime bounces the ball higher and across the net; missing the ball lets it land on your floor, which costs a life. Land the ball on the opponent's floor to score one point. Each rally that ends in a point speeds the opponent up slightly. Three lives total — the score at game over is your final.
Jump on the rise, not at peak. The ball gets the biggest forward boost when your slime's top surface is rising into the ball — tap as the ball is JUST descending into contact range, not when it's already on top of you. Late jumps just deflect, not return.
Don't jump every contact. A grounded contact sends the ball over the net too, with a flatter arc that's harder for the opponent to track. Save jumps for high lobs and times you want a steep attacking shot, otherwise let the slime kiss the ball at ground level.
Stay slightly left of the ball, not under it. The slime auto-tracks but always slightly lags. Inputting your jump assuming the slime is exactly under the ball misses — read where the slime ACTUALLY is, not where the ball is.
Attack the side, not the center. The opponent slime auto-tracks too and is fastest in the middle of its court. Aim returns toward the far right corner so the opponent has the longest distance to cover — many returns simply can't be reached.