No interest in the endgame

Random game I'd started to complete my 5 games so I could play in tournaments.  I'm not sure what happened in the end game there but it just looks like I lost interest.  I make a great (just boasting) tactical bishop sac which could have resulted in winning my opponents queen instead I just win back the material and just go out hunting pieces instead of pushing my two connected centre passed pawns. 

 

It was infuriating looking over this game again as I just seemed to ignore quick wins so many times.  I think I was just trying to save my energy for the tournament games that had just started.  Still you are warned that this game is by no means pretty.