Obligatory "good job!" comment because there isn't much to say for this map. Except I'm confused which path you're saying was already establishes as a failure (the Durandal path we just came from, or the Tycho path we're headed to?) There must be some reason the SO's subconscious thinks it's a good idea to go destroy Durandal's core. Unless these paths are just chosen for him at random by forces outside of his own control until he gets lucky enough to get into a successful one. Choice, or fate? Guess which one it is from the player's perspective. Oh, wait, we do get a choice. A choice to go backwarda and keep looping over and over and over... it could be the infinite Marathon game =)
Since you don't get your ammo taken, someone should play on Total Carnage and see how much ammo they can save up in the infinite cycle.