worldCreation = new ToggleGroup();
RadioButton worldCreation1 = new RadioButton("1");
worldCreation1.setFont(Assets.getFont(Assets.FONT_COURIERNEW_BOLD_13));
worldCreation1.setSelected(true);
worldCreation1.setUserData(new FlatLandWorldGenerator(0.15));
worldCreation1.setToggleGroup(worldCreation);
worldCreation1.setMinWidth(120);
worldCreation1.setMaxWidth(120);
RadioButton worldCreation2 = new RadioButton("2");
worldCreation2.setFont(Assets.getFont(Assets.FONT_COURIERNEW_BOLD_13));
worldCreation2.setUserData(new FlatLandWorldGenerator(0.3));
worldCreation2.setToggleGroup(worldCreation);
worldCreation2.setMinWidth(120);
worldCreation2.setMaxWidth(120);
RadioButton worldCreation3 = new RadioButton("3");
worldCreation3.setFont(Assets.getFont(Assets.FONT_COURIERNEW_BOLD_13));
worldCreation3.setUserData(new FlatLandWorldGenerator(0.45));
worldCreation3.setToggleGroup(worldCreation);
worldCreation3.setMinWidth(120);
worldCreation3.setMaxWidth(120);
RadioButton worldCreation4 = new RadioButton("4");
worldCreation4.setFont(Assets.getFont(Assets.FONT_COURIERNEW_BOLD_13));
worldCreation4.setUserData(new FlatLandWorldGenerator(0.6));
worldCreation4.setToggleGroup(worldCreation);
worldCreation4.setMinWidth(120);
worldCreation4.setMaxWidth(120);
RadioButton worldCreation5 = new RadioButton("5");
worldCreation5.setFont(Assets.getFont(Assets.FONT_COURIERNEW_BOLD_13));
worldCreation5.setUserData(new FlatLandWorldGenerator(0.75));
worldCreation5.setToggleGroup(worldCreation);
HBox worldCreationButtons = new HBox();
worldCreationButtons.setAlignment(Pos.CENTER);
worldCreationButtons.getChildren().addAll(worldCreation1, worldCreation2,