Hi there.
I never have put text in any of my maps, so don't know that one, I'm afraid.
To warp from one circle of power to another:
I usually create two regions. One at the entry circle and one at the destination circle.
Then I create a trigger that goes something like this: (freehand, havn't got Worldeditor opened.)
Event: Unit enters region entry circle (Or whatever you name the region, circle 1 perhaps)
Condition: none (or perhaps unit type comparison, triggering unit type equal to Hero)
Action: Unit - Instantly move (Triggering unit) to circle 2 (or other name) facing default building facing degrees.
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As for making a player win if he kills a critter.
The hard part is getting the event and/or condition right.
If the critter is in the game from the beginning in some far off place, there shold be no problem, just use specific unit event as event and pick your critter.
action should be Player - Owner of Killing unit (That one is a little hard to find if my memory serves me correct, but trust me it's there) then the victory action.
If the critter isn't in the game to begin with I imagine I would either make a variable to store that critter in when it is created. or use a generic unit event: a unit dies and check for it's the correct unit type in condition.
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Hope this has been off help.