The object is simple (in theory), just control the dot by the Arrow keys or W,A,S,D and make it to the green flag. There are 15 levels to complete in total all with increasing difficultly. Avoid touching the black lines otherwise you get sent back to the starting position. Just hope that you don't quit at some point!
Did you beat it? Then come and try the sequel! The Maze Trials 2! (make sure you beat this one first though...) Link to game: https://scratch.mit.edu/projects/299030303