Open the Level Editor window using the Tools > Level Editor menu.
At the bottom of the levels list, there are 2 buttons + and -. Use them to create new levels or remove the existing ones.
Enter level size.
Draw the level on the grid using the 5 buttons located at the bottom of the list.
Empty - defines empty positions on level.
Static - defines unmovable cells on level.
Color (1, 2, 3) - defines jellies positions on the playground.
You will have an Incorrect ****label and warning if the level is missing something to work correctly. The message with a problem will appear when the level is selected.
Changes are saved automatically. Once you’re done you can press the Test level button to test the level instantly.