Green Flag and watch to the end, then play the challenge In-Game (start at 6:00 AM in-game, play for 24 in-game hours, score based on newbucks.) This is here because at the time of making, Slime Rancher 2 doesn't have a rush mode.
Monomi Park for Slime Rancher 2 Challenge was made with 100% Vanilla Slime Rancher 2, but you may mod to modify difficulty, add modifiers like FSR (flutter slime revolution), or even make beatrix actually turn into a Tarr!