Quote from: spiderstar on December 28, 2012, 12:03:23 AM
You could have just pushed the mobs down on the side and get Tier 3 easily 
There are mobs glitched to the left, basically impossible to kill them, so no, he would be stuck on the first wave. Ross has already messed around with each level using this glitch a long time ago.
The glitch is caused because the game keeps a cache of the map after you played it once, thus leading to faster loading times each time you start up the level after the first time. After you change the level it will restart, the game has a max of 1 level stored per time.