Portal Co Op

I've been noticing that there are a lot of players that don't know how to read how many chambers have been completed on each level. (the orange and blue squares above each of the 5 entrances).

I asked a guy why he wanted to do level 5 when he hadn't touched 2, 3, or 4.
Then I asked if he knew what the squares above the doors meant and he said No. When I explained that each square represents a test, and that each test builds on the previous he said cool and agreed to start on the lowest Unfinished Test.

Please mention this to newer players especially if you've already completed the game (as I know most (if not all )of you have)). It kinda sucks to see the end when your only 10% complete (+/-)

If aomeone still wants to do a higher test because you opened access to that's their perogative but at least they are aware of it.

Thanks,
Jay