Replace "Pacifico.ttf" with an actual TTF file path

.go

package main

import (
	"fmt"
	"io/ioutil"
	"math/rand"
	"os"
	"time"

	_ "image/jpeg"
	_ "image/png"

	"github.com/faiface/pixel"
	"github.com/faiface/pixel/pixelgl"
	"github.com/faiface/pixel/text"
	"github.com/golang/freetype/truetype"
	"golang.org/x/image/colornames"
	"golang.org/x/image/font"
)

func loadTTF(path string, options *truetype.Options) (font.Face, error) {
	file, err := os.Open(path)
	if err != nil {
		return nil, err
	}
	defer file.Close()

	b, err := ioutil.ReadAll(file)
	if err != nil {
		return nil, err
	}

	ttf, err := truetype.Parse(b)
	if err != nil {
		return nil, err
	}

	return truetype.NewFace(ttf, options), nil
}

func testBig() {
	cfg := pixelgl.WindowConfig{
		Title:     "Pixel Rocks!",
		Bounds:    pixel.R(0, 0, 1024, 768),
		Resizable: true,
		VSync:     true,
	}
	win, err := pixelgl.NewWindow(cfg)
	if err != nil {
		panic(err)
	}

	face, err := loadTTF("Pacifico.ttf", &truetype.Options{
		Size: 72,
	})
	if err != nil {
		panic(err)
	}

	txt := text.New(face, text.ASCII)
	txt.Orig = pixel.Y(win.Bounds().H())
	txt.Color(colornames.Black)
	txt.LineHeight(1.5 * txt.Atlas().LineHeight())

	frames := 0
	second := time.Tick(time.Second)

	for !win.Closed() {
		if win.JustPressed(pixelgl.KeySpace) {
			txt.Clear()
			txt.Dot = txt.Orig
			for txt.Dot.Y() > -22 {
				for txt.Dot.X() < win.Bounds().W() {
					fmt.Fprint(txt, string(text.ASCII[rand.Intn(len(text.ASCII))]))
				}
				fmt.Fprintln(txt)
			}
		}

		win.Clear(colornames.White)
		txt.Draw(win)
		win.Update()

		frames++
		select {
		case <-second:
			win.SetTitle(fmt.Sprintf("%s | FPS: %d", cfg.Title, frames))
			frames = 0
		default:
		}
	}
}

func main() {
	pixelgl.Run(testBig)
}