令
order · command · decree · law
令 is the order itself — a directive issued from above: a command (命令), a law (法令), a shouted call to action (号令). The mini-game above puts you in the role of a subordinate: when the kanji 令 flashes on stage, tap; when it doesn't, hold still. The character itself is the cue. Eight correct calls and the kanji is yours.
Common compounds: 命令 (meirei, order), 法令 (hōrei, laws and ordinances), 号令 (gōrei, shouted order), 司令 (shirei, commanding officer).