The guidance for the adventure is on the mad lib portion of the pamphlet. It says that players will have 20 turns to gather ingredients and return to the main arena, these are the terms of the challenge. Think of it as a cooking show, If they don't have a dish done by then, death awaits them.
Whether players think killing Bakto is a good or bad thing is up to them, there are rewards in the adventure for simply surviving. About allergies, as it is stated in the pamphlet, "Bakto will not willingly inform players about it". On room 6. one of the NPCs may inform players about his weakness.