forgot to add I could've played queen c8 on turn 72 for a queen and rook endgame but this works also
Analysis of my win beating a 1500

Nice win. I won't get too deeply into it: I have just two shorter comments...
1) Your move 7 "tip" is good because it demonstrates your ability to check other options; just because your opponent offers you material, that doesn't mean you need to take it. However, I would have taken the pawn Yeah, it does give us doubled pawns, but don't forget we "win" another pawn in the process. Plus, the pawn on c3 actually helps us by controlling the Knight advancing squares of b4 and d4.
2) "Promoting to Knight would have been quicker checkmate, my bad" lol but it isn't quicker. Promoting into a Queen is actually mate in 3, but clearly the "best" moves for that mating net were not played xD
79. a8=Q Kd6 80. Qcc6+ was key. 80...Ke7 81. Qae8# or 80...Ke5 81. Qh8# (or Qa1#).
Good game though; a win is a win even if the opponent blundered their Queen really early
This is an analysis of everything from beating the 1500, including moves I could've played. (teaching purposes as well as for my own good)