private void showError(String error) {
Alert alert = new Alert(Alert.AlertType.ERROR);
alert.setTitle("Error");
alert.setHeaderText("Uh oh...");
alert.setContentText(error);
alert.showAndWait();
}
private void endGame() {
Alert alert = new Alert(Alert.AlertType.INFORMATION);
alert.setTitle("Game Over");
alert.setHeaderText("That's it, you failed");
alert.setContentText("Score: -1");
alert.setOnCloseRequest(e -> sm.setStage(StateManager.STATE_MENU));
alert.showAndWait();
}