A start for the kind of "attract screen" that whackamole should have...

Whackamole_Main_Menu.ino

/*
   Mole waiting animation
*/
uint32_t pixelSetTime[6];
uint32_t timeOfPlayerSelection;

Timer popUpTimer;

// number of players
byte numPlayers = 1;

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

  if (buttonPressed()) {
    // increase our number of players (1-3)
    numPlayers++;
    if (numPlayers > 3) {
      numPlayers = 1;
    }
    timeOfPlayerSelection = millis();
  }

  // animate the intro
  uint32_t timeSincePlayerSelection = millis() - timeOfPlayerSelection;
  if (timeSincePlayerSelection < 3000) {

    setColor(GREEN);  // draw the grass

    if (numPlayers == 1) {
      // present player
      // then fade out
      // fade back in the grass
      byte bri;
      if ( timeSincePlayerSelection < 255 ) {
        bri = timeSincePlayerSelection;
        setColorOnFace(dim(ORANGE, bri), 0);
      } else if ( timeSincePlayerSelection < 1500 ) {
        bri = 255;
        setColorOnFace(dim(ORANGE, bri), 0);
      } else if (timeSincePlayerSelection < 2750) {
        bri = (timeSincePlayerSelection - 1500) / 5;
        bri = bri * bri / 255;
        bri = bri * bri / 255;
        setColorOnFace(dim(ORANGE, 255 - bri), 0);
      } else {
        bri = timeSincePlayerSelection - 2750;
        setColorOnFace(dim(GREEN, bri), 0);
      }
    }
    else if (numPlayers == 2) {
      byte bri;
      if ( timeSincePlayerSelection < 255 ) {
        bri = timeSincePlayerSelection;
        setColorOnFace(dim(ORANGE, bri), 0);
        setColorOnFace(dim(YELLOW, bri), 1);
      } else if ( timeSincePlayerSelection < 1500 ) {
        bri = 255;
        setColorOnFace(dim(ORANGE, bri), 0);
        setColorOnFace(dim(YELLOW, bri), 1);
      } else if (timeSincePlayerSelection < 2750) {
        bri = (timeSincePlayerSelection - 1500) / 5;
        bri = bri * bri / 255;
        bri = bri * bri / 255;
        setColorOnFace(dim(ORANGE, 255 - bri), 0);
        setColorOnFace(dim(YELLOW, 255 - bri), 1);
      } else {
        bri = timeSincePlayerSelection - 2750;
        setColorOnFace(dim(GREEN, bri), 0);
        setColorOnFace(dim(GREEN, bri), 1);
      }

    }
    else { // 3
      byte bri;
      if ( timeSincePlayerSelection < 255 ) {
        bri = timeSincePlayerSelection;
        setColorOnFace(dim(ORANGE, bri), 0);
        setColorOnFace(dim(YELLOW, bri), 1);
        setColorOnFace(dim(MAGENTA, bri), 2);
      } else if ( timeSincePlayerSelection < 1500 ) {
        bri = 255;
        setColorOnFace(dim(ORANGE, bri), 0);
        setColorOnFace(dim(YELLOW, bri), 1);
        setColorOnFace(dim(MAGENTA, bri), 2);
      } else if (timeSincePlayerSelection < 2750) {
        bri = (timeSincePlayerSelection - 1500) / 5;
        bri = bri * bri / 255;
        bri = bri * bri / 255;
        setColorOnFace(dim(ORANGE, 255 - bri), 0);
        setColorOnFace(dim(YELLOW, 255 - bri), 1);
        setColorOnFace(dim(MAGENTA, 255 - bri), 2);
      } else {
        bri = timeSincePlayerSelection - 2750;
        setColorOnFace(dim(GREEN, bri), 0);
        setColorOnFace(dim(GREEN, bri), 1);
        setColorOnFace(dim(GREEN, bri), 2);
      }
    }
  }
  else if (timeSincePlayerSelection < 4500) {
    // hang tight before showing moles
    setColor(GREEN);  // draw the grass
  }
  else {
    // attract animation with the correct number of players
    if (popUpTimer.isExpired()) {
      popUpTimer.set(500 + rand(7 - numPlayers) * 250);

      // choose an open space to pop up into:
      getSpotToPopUp();

    }
    setColor(GREEN);  // draw the grass

    if (numPlayers == 1) {
      FOREACH_FACE(f) {
        if (millis() - pixelSetTime[f] < 500) {
          setColorOnFace(ORANGE, f);
        }
      }
    }
    else if (numPlayers == 2) {
      FOREACH_FACE(f) {
        if (millis() - pixelSetTime[f] < 500) {
          setColorOnFace(YELLOW, f);
        }
      }
    }
    else { // 3
      FOREACH_FACE(f) {
        if (millis() - pixelSetTime[f] < 500) {
          setColorOnFace(MAGENTA, f);
        }
      }
    }

  }
}

byte getSpotToPopUp() {
  byte f = rand(5);
  while (millis() - pixelSetTime[f] < 1500 ) {
    f = rand(5);
  }
  pixelSetTime[f] = millis();
  return f;
}