Constantly Changing Maze (1.9-1.13)

Hello everybody!
I made a small fun challenge: A constantly changing maze.

The Mirror Download is the 1.12 version.

There are about ±4,096 places where a wall could be placed/removed.
A wall gets placed and one gets removed every 0.1 seconds.
A wall getting placed has about 75% chance of being succesful (Cannot be placed if there already is a wall at the spot).
The distance between the start and the finish is in a straight line ±407 blocks. (√(288²+288²)=√165888≈407)
If you find any mistakes, please comment below.

I would advice picking a version below 1.13 because 1.13 tends to get quite laggy.
1.13:Download (18w11a compatible. DO NOT USE EARLIER SNAPSHOTS)
1.12:Download (This version will no longer be updated, only minor bugs)
1.11:Download (This version will no longer be updated, only minor bugs)
1.9-1.10:Download (This version will no longer be updated, only minor bugs)
(Check this website for older versions: https://kasper116.weebly.com)

This map should work in multiplayer with no maximum amount of players, but I haven't tested it.

!!! Version 1.9-1.11 don't have hard mode !!!


Don't forget to put your time score in the comments below, I'd love to read them.
My high score is 11 minutes and 58 seconds. (In normal mode)