After I enter the 3rd to last portal, and move on in the level, the first door I go through to move on in the level, the game crashes. After that, the game crashed when I tried to move on in the level, then it crashed when I tried to load the saved game, then it does not want to load the game at all, as in it won't even launch. 

I figured out that you shouldn't dash to move on in the level, otherwise that would crash the game. But my game crashing is something that I did not expect to happen.