You walk forwards, skirting an oil puddle, into the orange-yellow
cross. Inside you see a hall of locked doors, terminating on one large
one cracked open.
And yes, the other doors are locked beyond your means. Seems your hand
has been forced.
You hold your key out, and then yell in pain as the heat floods
through it into your hand. In the frantic race to suck on your
fingers, you accidentally swipe the key on the mobile red dot. At its
touch, the red dot expands across the firescape, growing lighter and
lighter as it does so, until the barrier disappears entirely.