micro:bit ボタン早押しゲーム

main.ts

let inGame = false
let pushedFlag = 0
let score = 0
let plot = 0
let showScoreLED: Function

input.onButtonPressed(Button.A, function () {
    if (!inGame) {
        gameStart()
    } else if (inGame && pushedFlag == 0) {
        scoreUp()
    }
})

input.onButtonPressed(Button.B, function () {
    if (inGame && pushedFlag == -1) {
        scoreUp()
    }
})

music.onEvent(MusicEvent.BackgroundMelodyEnded, function () {
    if (plot > 23) {
        gameClear()
    } else {
        gameOver()
    }
})

function init() {
    inGame = false
    pushedFlag = 0
    score = 0
    plot = 0
}

function scoreUp() {
    // 他の音と重ねることができない…
    // music.ringTone(262)
    score += 1
    showScoreLED()
    pushedFlag = ~pushedFlag
}

function gameOver() {
    basic.pause(250)
    basic.clearScreen()
    basic.showString("GameOver")
    inGame = false
}

function gameClear() {
    basic.pause(250)
    basic.clearScreen()
    basic.showString("Clear!")
    inGame = false
}

function gameStart() {
    init()
    music.playTone(523, music.beat(BeatFraction.Quarter))
    music.playTone(659, music.beat(BeatFraction.Quarter))
    music.playTone(784, music.beat(BeatFraction.Quarter))
    inGame = true
    basic.showNumber(3)
    basic.pause(500)
    basic.showNumber(2)
    basic.pause(500)
    basic.showNumber(1)
    basic.pause(500)
    basic.showNumber(0)
    music.beginMelody(music.builtInMelody(Melodies.Nyan), MelodyOptions.OnceInBackground)
    basic.clearScreen()
    showScoreLED = makeShowScoreLED()
}

function makeShowScoreLED() {
    let index = 2
    let thershold = 0
    let x = 0
    let y = 0
    return function () {
        if (score > thershold) {
            led.plot(x, y)
            if (plot > 23) {
                music.stopMelody(MelodyStopOptions.All)
            }
            plot++
            x = Math.floor(plot / 5)
            y = plot % 5
            thershold = Math.round(plot ** index / 36)
        }
    }
}