diff --git a/examples/platformer/main.go b/examples/platformer/main.go
index 2c903e647..8e8989b5a 100644
--- a/examples/platformer/main.go
+++ b/examples/platformer/main.go
@@ -113,6 +113,7 @@ func (c *char) draw(screen *ebiten.Image) {
 	}
 
 	op := &ebiten.DrawImageOptions{}
+	// Use a smaller scale than 1 to shrink the image.
 	op.GeoM.Scale(0.5, 0.5)
 	op.GeoM.Translate(float64(c.x)/unit, float64(c.y)/unit)
 	screen.DrawImage(s, op)
@@ -141,15 +142,15 @@ func (g *Game) Update() error {
 }
 
 func (g *Game) Draw(screen *ebiten.Image) {
-	// Draws Background Image
+	// Draws Background Image.
 	op := &ebiten.DrawImageOptions{}
 	op.GeoM.Scale(0.5, 0.5)
 	screen.DrawImage(backgroundImage, op)
 
-	// Draws the Gopher
+	// Draws the Gopher.
 	g.gopher.draw(screen)
 
-	// Show the message
+	// Show the message.
 	msg := fmt.Sprintf("TPS: %0.2f\nPress the space key to jump.", ebiten.ActualTPS())
 	ebitenutil.DebugPrint(screen, msg)
 }