Level Editor: go to the "Help" menu and Press "P", then a button labeled "Open the Debug Stage" will appear. so you only need to pause the game and select the Editor Option.
or you can beat the game to find it.
Break Bricks, Use PowerUps and progress through 11 Levels!
and after beating all levels, you can test the Level Editor! (Work in Progress)
the game doesn't contain music and the sprites were made by myself.
if you find a bug, please tell me!