Use W, A, and D to move. Use left and right arrow keys to turn. Use the slider on the top right to change the render distance. The higher it is the laggier (I recommend 100). Go near a door (light blue) and press space to open/close. Press c to put down a marker so you'll know if you been to a place.
Credit to Coding With Chris for a tutorial https://www.youtube.com/watch?v=mzznRhUA1Tk Other Stuff by me. This has three levels. I decided to make an entity (the red thing) that randomly moves around the maze. Don't worry, it cant hurt you. Please post in the comments if you want a new feature or find any bugs. Thx.