Player.pde

public class Player {
  public int x;
  public int y;
  private Maze maze;
  public boolean alive = true;
  public boolean won = false;
  public boolean moved = false;
  public boolean canMove = true;
  public Gun gun;

  public Player(int x, int y, Maze m) {
    this.x = x;
    this.y = y;
    this.maze = m;
  }

  public void keyPressed() {
    if (key == CODED && alive && canMove) {
      if (keyCode == UP && maze.validPos(x, y - 1)) {
        y--;
        moved = true;
      } else if (keyCode == DOWN && maze.validPos(x, y + 1)) {
        y++;
        moved = true;
      } else if (keyCode == LEFT && maze.validPos(x - 1, y)) {
        x--;
        moved = true;
      } else if (keyCode == RIGHT && maze.validPos(x + 1, y)) {
        x++;
        moved = true;
      }
    }
  }

  public void tick() {
    if (gun == null && x == maze.gun.x && y == maze.gun.y) {
      gun = maze.gun;
      gun.pickedUp = true;
    }
  }

  public void update() {
    tick();

    if (gun != null && !gun.broken) {
      image(
        maze.stor.gunSmall,
        (x * Settings.STEP) + Settings.STEP / 2,
        (y * Settings.STEP) - Settings.STEP / 6
      );
    }

    image(
        maze.stor.player,
        (x * Settings.STEP) + Settings.STEP / 2,
        (y * Settings.STEP) + Settings.STEP / 2
     );
  }
}