Ahh the delay

You can only move to one tile at a time, and only one person can cross at a time.

Every time you move to a new tile to the right, one tile immediately ahead of you will fall into the lava. No tiles disappear if you move to the left, with the exception of the rule below.

Random tiles fall into the lava by themselves over time. If you take too long, you won't be able to get back to safety. Seriously, SAVE before doing this.

Sophia will make all of this look easy once you cross.