I guess
50000000

I'll try 14152968

Code 33344400 ➽ Score: 1
Code 84521376 ➽ Score: 5
Code 56667777 ➽ Score: 3
Code 14159265 ➽ Score: 5
Code 42424242 ➽ Score: 0
Code 23114986 ➽ Score: 4
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Code 00001111 ➽ Score: 2
Code 88889999 ➽ Score: 6
Code 33335555 ➽ Score: 2
Code 66666666 ➽ Score: 2
Code 41526625 ➽ Score: 4
Code 54169376 ➽ Score: 5
Code 71050356 ➽ Score: 6
Code 77776666 ➽ Score: 1
Code 11111111 ➽ Score: 2
Code 11447799 ➽ Score: 4
Code 84521000 ➽ Score: 6
Code 64285412 ➽ Score: 4
Code 50000000 ➽ Score: 3
Code 14152968 ➽ Score: 6

At least some of the community knowledge is (I think):

• none: 2,4,7
• One, and its in 2nd to 4th digits: 6
• One: 1
• At least (and probably only) one: 0

• Probably one only: 5
• Probably one only: 3

Guessing: 16580939

again following Marv, just for the community (hope it is allowed as hasn't been mentioned explicitly not to in the rules:p)

If I computed correctly..lol

None - 2,3,4,7
One - 0 (5th or 6th spot from the left)
One - 6 (2nd, 3rd or 4th spot)
One - 1 (not in the last 4 spots)
One or Two - 5 (from guess 50000000, not in the first spot) (from guess 33335555 if one 5 then in last 4 spots but if two 5's then in 2nd, 3rd or 4th spots) (see 41526625... so maybe not 3rd spot as the count should have been 5 at the minimum then?)
8s or 9s - at least one 9, could be upto four of them (8's and 9's) combined depending on 5's)

my guess to narrow down options further

12222022

PS: I have not computed for all the guesses but only some so there may be some more clues that can be derived from this set.

I'm sure there's something wrong, anyway...
I'll try with: 81699058

86550998 that is my guess.

88888888 will be my next guess to narrow it down

I'll guess 81856059

I'm going with

81699058

My guess is 00700711

Has anyone ever guessed it right? Almost seems impossible

Well I just spent way to long thinking about this in excel, I still think some are wrong.

Im guessing

81868059

58222222 to get the number....

guessing 84551936

I won't say that anything unspecified in the rules is allowed because then I can't do anything about people cheating the game. But helping others is perfectly fine. You can crack the code faster by working together but then others might crack it before you. :)

Code 33344400 ➽ Score: 1
Code 84521376 ➽ Score: 5
Code 56667777 ➽ Score: 3
Code 14159265 ➽ Score: 5
Code 42424242 ➽ Score: 0
Code 23114986 ➽ Score: 4
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Code 00001111 ➽ Score: 2
Code 88889999 ➽ Score: 6
Code 33335555 ➽ Score: 2
Code 66666666 ➽ Score: 2
Code 41526625 ➽ Score: 4
Code 54169376 ➽ Score: 5
Code 71050356 ➽ Score: 6
Code 77776666 ➽ Score: 1
Code 11111111 ➽ Score: 2
Code 11447799 ➽ Score: 4
Code 84521000 ➽ Score: 6
Code 64285412 ➽ Score: 4
Code 50000000 ➽ Score: 3
Code 14152968 ➽ Score: 6
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Code 16580939 ➽ Score: 7
Code 12222022 ➽ Score: 3
Code 81699058 ➽ Score: 16
Code 86550998 ➽ Score: 9
Code 88888888 ➽ Score: 4
Code 81856059 ➽ Score: 11
Code 81699058 ➽ Score: 16
Code 00700711 ➽ Score: 2
Code 81868059 ➽ Score: 11
Code 58222222 ➽ Score: 2
Code 84551936 ➽ Score: 6

So without thinking, I started copying the codes one by one into my checker and after the 3rd code, I could barely comprehend that it gave a score of 16. First thought: what the fuck, second thought: what a lucky guess. We have found a winner! I proceeded with the other scores for anyone who likes to know their score anyway when I came across a second winner. I guess luck is off the table.

Winner #1 ➽ Auryn
Winner #2 ➽ bigger-half

I appreciate MarvHarvey and nina@ for sharing their thoughts and after reading them, their deductions were pretty spot on. But like I wrote before I started checking the codes (see top paragraph), you might help others crack the code before you. :D