Arrow keys or WASD. You know what to do, bring the purple circle to the blue. Rhyme not intended. Hold space to see all the special variables, the ones used to modify the maze and decide start/end stuff, etc. The maze in the thumbnail is actually generated 1 second after the stop sign is clicked.
@griffpatch for the tutorial. I thought a tutorial on computer generated mazes would be interesting, and so I watched the one he made then put my own spin on it to spice up gameplay. I put a little trivia in the border sprite's coding.