FAULTY CODE (Extreme Demon) by TheRealXFuture (first on the leaderboard!)
I came across this level when looking for a new Tier 23 level on the GDDL to complete as a hardest. I happened to find this level, which was in all caps (which to me signified it was a good level), so I decided to give this level a look. I think what brought me to want to play this level was the "end" screen (the hallway), which I just happened to fall in love with due to how lonely it looked.
Like any extreme demon, there were some high points and some low points. When I first practiced the level, it was probably my best experience with an extreme demon. For some reason, I just happened to like the "different themes" of the level, which is supposedly different sections of the brain. My low points for this level were on Day 2 after my 83% fail. Even after trying to grind at the level for several hours (don't ask why I spent so much time on this), I couldn't make any new progress.
However, I was determined to beat the level as soon as I could, since there was an opportunity to have the #1 spot on the leaderboard. Before I beat this, there were 7 100% completions according to the leaderboard (with most of the profiles looking suspicious), but none of them got any of the coins. Being the first to beat the level with coins (apart from the verifier) would probably mean a significant amount to me, but I can't really tell that.
I thought that memorizing the code was giving me a block in gameplay, so I decided that I should stream it as a reference to lighten the load. I considered that some could say that's cheating, but I realized that the verification required something similar: help from another person. But I only have myself since my brother wouldn't be interested in watching me beat an extreme demon. So I stuck with using myself.
This is probably my favorite extreme demon (enjoyed it more than Daydream) and it's currently my new hardest!
Edit: Found that there exists a player who has beaten this with coins before, but they weren't on the leaderboard.
=Level Info=
Name: FAULTY CODE
Creator: TheRealXFuture
Difficulty: Extreme Demon
Song: Cacola - Unused Assets
ID: 86230468
GDDL Tier (as of writing this): 23 (rated by Unrated)
Personal GDDL Tier: 23
Worst Fail: 83%
Number of Insane Demons Completed: 41
Number of Extreme Demons Completed: 10
Top 10 Hardest Completed Demons (my opinion):
1) FAULTY CODE
2) Daydream
3) Myocardia
4) Napalm
5) Broken Signal
6) Azurite
7) Incipient
8) HyperSonic
9) TANTRUM
10) Thanatophobia