funrealistic

Unrealistic for the sake of fun.

Could be applied to, for example:
* The physics in arcade racing games
* The sound of explosions, etc in the vacuum of space
* The physical attributes of fictional female characters

1. "The handling of cars in Need for Speed: Most Wanted is highly funrealistic."

2. "Hmm, these physically accurate silent space scenes are actually pretty boring."
"Yeah, this movie could use some funrealism."