Black can, and should, simply capture this pawn.

Again, you're just narrating without analyzing. It's important to ask yourself: why did you make this move, and were there others you could have made instead? For instance, here you could have played 13.exd5, threatening the Black Knight and winning a free pawn.

thanks I guess i would start thinking like that so i could improve when i do these.

I'm just going to keep mentioning it: always be looking at why you made the moves you did, and whether you could improve on them with more time to think. Here, you should have played 20.dxc6 e.p. and then 21.axb6 once Black's Bishop retreated. That way you get to use your light square bishop in the attack from all the way across the board, and your attack is much, much stronger!

Again, give some analysis. For instance, this move is really, really bad. Why? Because Black could have just captured your pawn right back, then played 21...Kb7 after 21.Ra8+ with no trouble!

King goes down is also ambiguous in that you could mean that the king falls.