Fixed a way to skip all 2nd "chamber" just by putting portal under bridge and on white panel after the puzzle by standing on the portal under bridge...

Changed puzzle 1:
- Now you can't use cube to reach the room.

Changed puzzle 2:
- Fixed a non intended solution to reach button without doing the puzzle at all. (no more white panel near button)
- Removed the unecessary Fences to let player see better
- Removed some white panel and add somme block to help center portal and get the "floor bridge"

Changed puzzle 3:
- Put a secondary checkpoint if jump fail for some reason
- Can now respawn reflection cube by pressing button
- Open window to sphere
- put 2 buttons to reset cube at end (and open end door) that will allow the laser pass trought window and give a nice continuiting feeling after reaching elevators. (even if this window should be on same height as end door but most people won't notice that I hope).