BeatSync

Train your sense of timing with a calm, focused visual rhythm game that works completely offline. Markers fall down three lanes toward a bright judgement line, and you tap the matching lane as each marker reaches it. No external songs or accounts are needed. Every beat pattern is original. Forty levels are arranged in four chapters. Calm introduces single taps on a steady four-beat grid. Syncopation adds off-beat notes. Alternation adds quick moves between neighboring lanes. Compound mixes double taps and short holds. Each level lasts between 45 and 120 seconds, and a chapter unlocks when you clear seven levels in the chapter before it. Every hit is judged against the beat. PERFECT lands within 40 milliseconds, GOOD within 90 milliseconds, and EARLY or LATE within 150 milliseconds. Anything further away, or any marker you do not tap, counts as a miss. Consecutive hits build your combo, and a miss resets it without ending the level, so you can keep going and recover. Hold markers ask you to press at the start, keep the lane pressed while the hold is active, and release near the end. The game shows HOLD START, HOLDING and HOLD RELEASE so you always know which stage you are in. Before a level starts, a short briefing lists its lanes, the actions it uses, its target accuracy, and whether your calibration offset is applied. A three-beat visual countdown runs before the level begins and again after every pause, so you can get back into the rhythm. After each level, the results screen shows how many of each judgement you earned, which section of the song was most often early or late, how many problems each lane produced, and your highest combo. You can then replay the weakest 15-second section on its own. The calibration tool lets you tap along with a flashing ring. It measures the delay between the flash and your tap and suggests a timing offset for this device. You can apply it, recalibrate, or reset it to default at any time. Preferences let you turn sound effects and light haptic feedback on or off without changing how the game plays. Left-hand layout mirrors the lane order. An enlarged judgement line makes the target easier to see. Reduced motion removes glows, flashes and bouncing text. Pattern aids add lane dividers and target markers. Every lane is marked by its position, its shape and its label, so the game stays readable even with sound turned off. Your level completion, highest accuracy per level, highest combo and recent results are saved on this device. You can clear saved progress from Preferences whenever you want to start over.