diff --git a/affine.go b/affine.go
index bd26c7ef3..83b30d300 100644
--- a/affine.go
+++ b/affine.go
@@ -38,7 +38,7 @@ func isIdentity(ebiten affine) bool {
 func add(lhs, rhs, result affine) {
 	dim := lhs.dim()
 	if dim != rhs.dim() {
-		panic("ebiten: diffrent-sized matrices can't be multiplied")
+		panic("ebiten: different-sized matrices can't be multiplied")
 	}
 
 	for i := 0; i < dim-1; i++ {
@@ -52,7 +52,7 @@ func add(lhs, rhs, result affine) {
 func mul(lhs, rhs, result affine) {
 	dim := lhs.dim()
 	if dim != rhs.dim() {
-		panic("ebiten: diffrent-sized matrices can't be multiplied")
+		panic("ebiten: different-sized matrices can't be multiplied")
 	}
 
 	for i := 0; i < dim-1; i++ {
diff --git a/examples/airship/main.go b/examples/airship/main.go
index 5f926fe4f..b47a9c63a 100644
--- a/examples/airship/main.go
+++ b/examples/airship/main.go
@@ -213,7 +213,7 @@ func update(screen *ebiten.Image) error {
 		return err
 	}
 
-	tutrial := "Space: Move foward\nLeft/Right: Rotate"
+	tutrial := "Space: Move forward\nLeft/Right: Rotate"
 	msg := fmt.Sprintf("FPS: %0.2f\n%s", ebiten.CurrentFPS(), tutrial)
 	if err := ebitenutil.DebugPrint(screen, msg); err != nil {
 		return err