Hackvent 2019: Day 19

Challenge

HV19.19 ?

Introduction

???????????????⛺❗️??????️?????????????????⁉️????????????????????⛪???????????❤️????????????????????????????????????????????⛴???????????????????⛄??⏳?????????????????????????????????????????????????????????????????????????????✨???????????⛲??????????⛵?????????????????? ❗️➡️ ㉓ ??????❗️➡️ ??㊷ ? ⌘ ?⏩⏩ ???❗️ ?㉓❗️❗️ ? ⌘ ➡️? ㊷ ? ㉓ ⌘❗️❗️? ?????????????❤️??❤️???????⛪???? ❗️➡️ ? ??????????? ❗️➡️ ? ? ? ? ➡️ ??⁉️ ➡️ ?? ?❗️?? ? ? ??❗️???❗️????❗️❗️❗️ ➡️ ? ↪️??❗️? ???❗️???????❗️? ☣️??????❗️❗️➡️ ✓? ⌘ ?⏩⏩???❗️??❗️❗️?? ㊷ ? ? ⌘❗️❗️ ➡️ ⌃? ? ⌘ ???❗️❗️➡️ ^??⌃➖?㉓❗️➗?????❗️❗️❌^❌?⌘❗️➡️ ⎈ ↪️ ⌘ ◀ ??❗️?❎?? ㊷ ? ? ⌘❗️❗️➖ ?? ??❗️➕??❗️➖??❗️➖??❗️➕????❗️?✖??????❗️? ? ?⎈❗️❗️? ??????❗️?✍✓ ⎈ ⌘ ????❗️❗️?????✓ ??❗️❗️❗️➡️ ⌘↪️⌘ ? ?‍♀️???????❗️???⌘❗️? ?

Solution

We see a bunch of emoji and immediately think its EmojiCode!
Initially we want to play around with the code so we go tio.run/#emojicode6 and enter in our code.

Upon running our code we get a prompt and entering random input crashes our program to panic and crash:

? ➡️ ??⁉️ ➡️ ?? 
? Program panicked: ?

Amazingly, based on the prompt alone of Santa being confused around a lock emoji (?) , I decide to try the key emoji (?) as input.
This actually gave me the flag making the time to completion only 8 minutes!
Unintended but I'll take it.

Flag:

HV19{*<|:-)____\o/____;-D}