Move: drag on the left side of the screen (phone) or WASD / arrows. You get help tracking the ball, but you can rush the net or reposition any time. Serve: aim WIDE / BODY / T with Q/E, A/D or a sideways swipe. Press to toss. A quick tap is a safe serve. Hold and release at the top (green on the meter) for a power serve. Rally:release as the cursor hits green (PERFECT > GOOD > EARLY/LATE). Tap for control, hold until the ring is solid for power. High balls near the net get smashed automatically.
Swipe up = topspin · down = slice · left/right = aim · double-tap = lob · or use the shot chips. Desktop: Space (hold/release) · 1 Flat 2 Top 3 Slice 4 Lob 5 Drop · Q/E aim