Originally created for the JayIsGames.com Casual Gameplay Competition in 2010, ...But That Was [Yesterday] is a short form game about learning to move forward. Featuring simple controls, a wordless narrative, gorgeous dreamlike visuals, and an original soundtrack synced to your memories, this is a powerful experience that has moved many.

Features:

a girlfriend, a best friend, and man's best friend
simple controls
multiple endings
full mp3 soundtrack included, along with medley version
it's like 10 minutes long

Here is a making-of mini featurette, if you're interested in that. You should really play the game before watching it:

...But That Was [Yesterday] (2010 version) screenshots