You don't have any info as to whether or not you were playing White or Black. As such, I am making the assumption here that you were Black.

I don't see the reason for move 13. e6.  Perhaps the move could have been spent better elsewhere?  Your little battle for his last Knight was pretty good.

Move 26, he should have played e4 instead of Rd1, which means that if you were to have a better play leading into endgame, thats the primary move you would want to change to look towards alternative endgames that could have resulted from all this.