Do what the tutorial-lady says.
From Create Your Own Story
GRENADE LAUNCHER ACQUIRED!
Moving before the MECHS even know what's happening, you prop it on the RAILING and fire a grenade, blasting them apart and RUPTURING a PIPE. The PIPE was apparently made to transport FIRE to and from the facility, because it starts spewing FLAMING HOT DEATH all over the place.
AUSTRALIAN: Good! Now go take the elevator down one floor.
You hop over the RAILING instead, and storm right through the FIRE to the other side, ignoring her half said TUTORIAL SPEECHES.
AUSTRALIAN: You're doing gre-CHKKK -pard, no-SHHCKKMechCHHHECK ATTACKchhhhhhhhhhh
You bang on your EAR as you pass the corner, but the signal's gone. Perhaps that means the tutorial's over. Now that you think of it, you wonder how she was contacting you. Maybe these crazy scientists superglued a TINY PHONE inside your head while you were out. You wouldn't put it past them.
You see a SIDE ROOM and a MAIN DOOR.