Hmm, i just thought of another use for this.
You can use it to save people's checkpoints in a challenge/RPG after they leave.
Here's how it goes...
When a new level is entered, addVariable Lvl2 1.
Then, on the spawn brick, use onPlayerTouch ifVariable Lvl2 Equals 1.
And then...onVariabletrue setPlayerTransform Lvl2Spawn.
What this does, is if they have the variable for the level, they are teleported to that level to pick up where they left off.
I'm sorry if this seemed kind of confusing, I just thought of it.