In this video, I cover getting all the Teensies and Cups for the "Sprint for Your Life" level of "Rescue Selena" contained within "Fiesta de los Muertos".
The gold cup requirement is pretty strict for this level, but basically all of the purple lums are handed to you and are easy to collect.
2:05 - Forgot to collect all this crap before first recording for today. The Creatures are quite possibly the most ancillary and unnecessary feature in the entire game. Their purpose is basically to shit out lums not unlike Insaniquarium, but at least the latter is more fun interacting with than the former. Reeks of trying way too hard to make an "addicting" feature IMO.