Code Sketch

import scala.collection.mutable.ArrayBuffer

clear()
originBottomLeft()

// ============================================================
// STOP THE SECONDS - NAG PANCHAMI EDITION V1.0
// ============================================================

var globalTime = 0.0
var currentStage = 0 // 0: Welcome, 1: Instructions, 2: Game Play

// ??? ???????????
var startTime: Long = 0L
var elapsedTime: Double = 0.0
var isTimerRunning: Boolean = false
var targetTime: Double = 5.0 // ????? ??????? (???. 5.0 ?????)
var score = 0
var bestDiff: Double = 999.0

// ?????????? (????? ??????????)
case class Particle(var x: Double, var y: Double, var vx: Double, var vy: Double, var col: java.awt.Color)
val particles = ArrayBuffer.empty[Particle]

def spawnParticles(x: Double, y: Double, count: Int): Unit = {
  var i = 0
  while (i < count && particles.length < 200) {
    val col = if (randomBoolean) Color(255, 215, 0) else Color(255, 105, 180)
    particles.append(Particle(x, y, randomDouble(-2.5, 2.5), randomDouble(-2.5, 2.5), col))
    i += 1
  }
}

// ????? ??????? ??? ????? ???
animateWithState(0.0) { angle =>
  erasePictures()
  globalTime += 0.03

  // ?????????? ????? ????
  particles.filterInPlace(_.col.getAlpha > 0)
  particles.foreach { p =>
    p.x += p.vx
    p.y += p.vy
  }

  // ?????????? (???????? ????? ???)
  setBackground(Color(15, 25, 45))

  if (currentStage == 0) {
    // --- ????? 0: ????? ??????? ---
    val title = Picture.text("STOP THE SECONDS - FESTIVAL CHALLENGE", 22)
    title.setPenColor(Color(255, 215, 0))
    title.setPosition(cwidth / 2.0 - 220, cheight - 120)
    draw(title)

    val sub = Picture.text("Stop the timer exactly at the Target Time using SPACEBAR!", 14)
    sub.setPenColor(Color(200, 230, 255))
    sub.setPosition(cwidth / 2.0 - 210, cheight - 160)
    draw(sub)

    val prompt = Picture.text("Click anywhere or Press ENTER to Continue", 14)
    prompt.setPenColor(Color(255, 180, 50))
    prompt.setPosition(cwidth / 2.0 - 160, 80)
    draw(prompt)

  } else if (currentStage == 1) {
    // --- ????? 1: ???? ??? ?????? ---
    val heading = Picture.text("=== GAME RULES & TARGET ===", 18)
    heading.setPenColor(Color(255, 220, 100))
    heading.setPosition(cwidth / 2.0 - 150, cheight - 80)
    draw(heading)

    val r1 = Picture.text(s"1. Target Time: $targetTime Seconds", 15)
    r1.setPenColor(Color(255, 255, 255))
    r1.setPosition(cwidth / 2.0 - 150, cheight - 130)
    draw(r1)

    val r2 = Picture.text("2. Press SPACEBAR to START the timer.", 15)
    r2.setPenColor(Color(255, 255, 255))
    r2.setPosition(cwidth / 2.0 - 150, cheight - 170)
    draw(r2)

    val r3 = Picture.text("3. Press SPACEBAR again to STOP near the target!", 15)
    r3.setPenColor(Color(255, 255, 255))
    r3.setPosition(cwidth / 2.0 - 150, cheight - 210)
    draw(r3)

    val startPrompt = Picture.text("Press ENTER or Click to START Game!", 16)
    startPrompt.setPenColor(Color(50, 255, 100))
    startPrompt.setPosition(cwidth / 2.0 - 160, 70)
    draw(startPrompt)

  } else {
    // --- ????? 2: ????? ??? ???? ??????? ---

    // ?? ????? ???? ???? ?? ??? ?????
    if (isTimerRunning) {
      val currentMillis = System.currentTimeMillis()
      elapsedTime = (currentMillis - startTime) / 1000.0
    }

    // ??????? ????? ?????? (??????????)
    val outerRing = Picture.circle(80.0)
    outerRing.setPenColor(Color(255, 215, 0))
    outerRing.setPenThickness(3.0)
    outerRing.setPosition(cwidth / 2.0, cheight / 2.0 + 20)
    draw(outerRing)

    // ??????? ??? ????????? ??????
    val timeDisplay = Picture.text(f"$elapsedTime%2.2f s", 32)
    timeDisplay.setPenColor(if (isTimerRunning) Color(0, 255, 127) else Color(255, 100, 100))
    timeDisplay.setPosition(cwidth / 2.0 - 65, cheight / 2.0 + 10)
    draw(timeDisplay)

    // ?????? ??? ??????
    val targetText = Picture.text(s"Target: $targetTime.00 s | Score: $score", 16)
    targetText.setPenColor(Color(255, 220, 100))
    targetText.setPosition(50, cheight - 50)
    draw(targetText)

    val hintText = Picture.text("Press SPACEBAR to Start / Stop! | Press R to Reset", 14)
    hintText.setPenColor(Color(200, 230, 255))
    hintText.setPosition(50, cheight - 80)
    draw(hintText)
  }

  angle + 1.0
}

// ???? ????? ????????
onMouseClick { (x, y) =>
  if (currentStage == 0) {
    currentStage = 1
  } else if (currentStage == 1) {
    currentStage = 2
  }
}

// ??????? ??????? (Spacebar ???? ????? ??? ?????)
onKeyPress { k =>
  if (currentStage < 2) {
    if (k == '\n' || k == '\r') {
      currentStage += 1
    }
  } else {
    // ??? ???????? ??-????? ?????????
    if (k == ' ') { // ???????? ????????
      if (!isTimerRunning) {
        // ??? ???? ????
        startTime = System.currentTimeMillis()
        isTimerRunning = true
      } else {
        // ??? ???????
        isTimerRunning = false
        val diff = Math.abs(elapsedTime - targetTime)
        
        if (diff <= 0.15) {
          score += 10
          spawnParticles(cwidth / 2.0, cheight / 2.0, 35)
        }
      }
    } else if (k == 'r' || k == 'R') {
      // ????? ??????????
      isTimerRunning = false
      elapsedTime = 0.0
    }
  }
}

println("=== STOP THE SECONDS GAME LOADED SUCCESSFULLY ===")