unary op bugfix

example/src/main.nub

@@ -28,14 +28,21 @@ extern "main" func main(args: []cstring): i64
         }
         raylib::EndDrawing()
 
-        if x + width >= raylib::GetScreenWidth() || x <= 0
+        if x <= 0
         {
-            direction.x = -direction.x
+            direction.x = 1
         }
-
-        if y + height >= raylib::GetScreenHeight() || y <= 0
+        else if x + width >= raylib::GetScreenWidth()
         {
-            direction.y = -direction.y
+            direction.x = -1
+        }
+        else if y <= 0
+        {
+            direction.y = 1
+        }
+        else if y + height >= raylib::GetScreenHeight()
+        {
+            direction.y = -1
         }
 
         x = x + @floatToInt(i32, direction.x)