At the beginning when we can choose between three doors, I managed to press two buttons. Any suggestions on what to do next?

Hello! I would like to platinum this game and I am currently missing 2 hidden achievements. I am curious to know what these are. I have completed Hefty Hero, Waddling Warrior, Dragoness Devourment, Monster Milk, Floating Fiend, Brobdingnagian Barbarian, Detonated Devil, Max Decibels ONLY, Brave to the Grave, Bellagarth the Bully, Bellagarth the Braindead, Stay right there, Beating the Bandit, Chew your food, Tying up loose ends, Not worth the calories, Persistent parrier, Met your match, Fourced to conce...

As you know in Lilith's Lair we have 6 endings and 1 Hidden. After getting the hidden ending we see a closed chest. What do you think might be inside?

Casting the balloon spell isn't granting me the achievement.

spoilers ive got all the endings [even the secret confetti one]| ||i was mean to the witch, spanked her, and just left her i drank the snake oil, bit the bandit, spared and ate her, slapped her after putting out her fires i flirted with, attacked and ate the dragon did the flattening door after scanning it did all the jester games,and ignored them tried attacking the cat, pet it, and beat it up did the highest belching ,and blocked the snake|| ive got no idea how to get the last achievment, i think its ...