Star Munchkin ending game

[MunchkinMan]

He does not get the level. For reference, that's covered in the rules on p. 4, "Fighting Multiple Monsters":

Originally Posted by The Rules

If you have the right cards, you can eliminate one monster from the combat and fight the other(s) normally, but you cannot choose to fight one and run from the other(s). If you eliminate one monster, but then run from the other(s), you don’t get any levels or Treasure!

Again, nothing on the card hints that it's breaking this rule, and it would have to specifically say it was breaking the rule about getting rewards while still in combat, so there's no way for the one player to get where he was trying to go.