diff --git a/internal/editor/model.go b/internal/editor/model.go
index 8eb7bed..63be138 100644
--- a/internal/editor/model.go
+++ b/internal/editor/model.go
@@ -210,6 +210,35 @@ func (m *Model) processInsertKey(key string) {
 		}
 		m.SetCursorX(x + len(tabs))
 
+	case "up":
+		if y > 0 {
+			m.SetCursorY(y - 1)
+			m.ClampCursorX()
+		}
+
+	case "down":
+		if y+1 < m.LineCount() {
+			m.SetCursorY(y + 1)
+			m.ClampCursorX()
+		}
+
+	case "left":
+		if x > 0 {
+			m.SetCursorX(x - 1)
+		} else if y > 0 {
+			prevLine := m.Line(y - 1)
+			m.SetCursorX(len(prevLine))
+			m.SetCursorY(y - 1)
+		}
+
+	case "right":
+		if x < len(l) {
+			m.SetCursorX(x + 1)
+		} else if y+1 < m.LineCount() {
+			m.SetCursorX(0)
+			m.SetCursorY(y + 1)
+		}
+
 	// Regular character
 	default:
 		if x < len(l) {