[Game Menu 02]

create_01.gml

// Basic Variables
menu_x = x;
menu_y = y;
button_h = 24;
button_w =190;
button_padding = 10;
menu_index = 0;
last_selected = 0;

// Button Array
button[0] = "New Game";
button[1] = "Load Game";
button[2] = "Options";
button[3] = "Exit Game";
buttons = array_length_1d(button);

// Array checker for unfold effect
var i = 0;
repeat(buttons) {
	unfold[i] = 0;
	i++;
}

draw_01.gml

// index variable
var i = 0;
repeat (buttons) {
	
	// set up menu font
	draw_set_font(ft_main);
	draw_set_halign(fa_center);
	draw_set_valign(fa_middle);

	// horizontal and vertical location
	xx = menu_x  - 256 * (1 - unfold[i]);
	yy = menu_y + (button_h + button_padding) * i;
	
	// the box
	draw_set_colour(c_dkgray);
	draw_rectangle(xx, yy, xx + button_w, yy + button_h, false);
	
	// font default color
	draw_set_colour(c_ltgray);
	
	// font selected color
	if (menu_index == i) draw_set_colour(c_red);
	
	// draw text and set to center of box.
	draw_text(xx + button_w/2, yy + button_h/2, button[i]);
	i++;
}

step_01.gml

// navigate the menu
menu_move = keyboard_check_pressed(vk_down) - keyboard_check_pressed(vk_up);

menu_index += menu_move;
if (menu_index < 0) menu_index = buttons - 1;
if (menu_index > buttons - 1) menu_index = 0;

// unfold effect
var i = 0;
repeat(buttons) {
	if (unfold[i] == 1) i++;
	if (i < buttons) unfold[i] = min(1, unfold[i] + 0.02);
	if (i + 1 < buttons) unfold[i + 1] = min(1, unfold[i + 1] + 0.005);
}

// tho sound effect
if (menu_index != last_selected) audio_play_sound(sd_menuswitch,1,false);

// check for selected
last_selected = menu_index;