Locksmith — free browser game

You're a locksmith; every lock has several pins and you have to set them one by one from left to right. A bright indicator glides up and down over the active pin, while the green safe zone in the middle of the pin stays fixed. When the indicator is right inside the green zone, press Space or Enter (or tap/click the area) — the pin sets and you move on to the next one. Once you've set all the pins the lock opens, your score goes up by one and the next lock arrives: more pins, a faster indicator and a narrower safe zone. If you set it while the indicator is outside the zone, a pick breaks; when all three picks break the round is over. The highest number of locks you've opened is saved as a record in your browser. Tip: remember that the indicator slows for a moment at the turning points (the very top and very bottom), but the safe zone is in the middle; rather than rushing and pressing at the edge, calmly wait for the indicator to enter the zone. In the narrow zones, try to catch the indicator dead centre so you have a margin for reaction as the speed increases.