Oh thanks for your feedback, I have fixed this bug.

We put the reflective cube in the laser at an angle, which let us use the portals to trigger the laser switches that we otherwise wouldn't have been able to. The last one was triggered by angling it out of the ground next to the switch. Then instead of using the elevators, we put a portal on the ground and ceiling to get momentum, then shot out of the wall to land on the top level and escape.

Could you explain how you did that so I can try to optimize this map for co-op?

We absolutely cheated this level using one cube. So much fun.

You should have 2, not 3. Good luck :)

i have a question,how many block i have , i have 2,its a bug? should i have 3?

Also, the companion cube is there just for show ;)

You will need the button if you're playing alone, as mentioned. This is not meant to be a co-op map ^^

I did the map withouht the companion cube or the timer lift thing. With my partner I just used the angles of the lasers to hit all of the things then won

did not need the button

I have noticed that people tend to play this map over the original non co-op map. Not sure if co-op makes this map any more doable but try the single player map as well for more challenge :)