Silly example for working with my tetris library

Main.kt

import block_factory.RandomBlockCreator
import board.Cell
import game.GameCell
import game.ghost.GhostGame
import score.SimpleScoreCalculator
import java.awt.FlowLayout
import java.awt.Frame
import java.awt.Label
import java.awt.event.KeyEvent
import java.awt.event.KeyListener

class Main(private val gameFacade: GameFacade): KeyListener{

    override fun keyTyped(e: KeyEvent?) {}

    override fun keyPressed(e: KeyEvent?) {
        when(e?.keyCode) {
            KeyEvent.VK_DOWN -> gameFacade.down()
            KeyEvent.VK_LEFT -> gameFacade.left()
            KeyEvent.VK_RIGHT -> gameFacade.right()
            KeyEvent.VK_A -> gameFacade.rotateLeft()
            KeyEvent.VK_S -> gameFacade.rotateRight()
        }
        paint(gameFacade.getGrid())
    }

    override fun keyReleased(e: KeyEvent?) {}

    fun paint(grid: List<List<GameCell>>) {
        print("|----------|\n")
        for (row in grid) {
            print("|")
            for (cell in row)
                print(cell)
            print("|\n")
        }
        print("|----------|\n\n\n\n\n")
    }

    private fun print(cell: GameCell) {
        when(cell.cell) {
            Cell.EMPTY -> print(" ")
            else -> {
                if (cell.isCurrentBlockCell)
                    print("I")
                else if (cell.isGhostBlockCell)
                    print("*")
                else
                    print("X")
            }
        }
    }

}

fun main() {
    val frame =  Frame()
    frame.layout = FlowLayout()
    frame.setSize(500, 500)
    val l = Label()
    l.setText("This is a demonstration")
    frame.add(l)
    frame.setVisible(true)
    val game = GameFacade(ghost = true) // Initialize with ghost block enabled.
    game.start()
    frame.addKeyListener(Main(game))
}