One of the diversifiers for AGBIC 2017 is:

glitch lyfe - If you encounter a bug that is silly but not game breaking, don't fix it.

There are 2 bugs that were purposely and knowingly left in the game:

1. Garth runs through closed doors.
   This "bug" was in the game from a very early stage, and I decided to leave it in. It's silly and definitely not gamebreaking.
2. Garth is very competitive at fetch.
   If you throw the bone and manage to run and pick it up before Garth gets there, he has a bit of a freak out. This one got left in because it's kind of hard to pull off, and it made me laugh when I first saw it. 

I'm sure there are others to be found. Let me know if you find any!