Perfect Run conditions:
-No damage taken
-No secondary weapon usage unless deemed necessary
-No kills unless deemed necessary
If only Chapter 3 was as quick as this dungeon. Granted, the Dodo Birds and Ninja Monkeys can be unpredictable, and then the Bone Heads are right durable nuisances, but the only thing that let this take long was to see which rooms were kill rooms and which weren't. Only the last room, with the Noctos in the darkness, wasn't.
I can at least see the intent of Startropics scoring was likely intended to encourage players to focus on staying alive, so as to not have to repeatedly kill enemies especially in kill rooms.
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