Mission 3

The portal on the left will take you to the top right of the map, but you will land on a platform that will quickly move out of the way and drop you. You must avoid dropping and kill the spawners to get the bluetonium needed to finish the level.

If you want to fully complete the level you must destroy the shield generators which will allow you full access to the map. The first portal that is locked behind a shield takes you to a death fall trap.

 

If you climb up the left wall you can find a portal that take you into the room with the Secret Counter.