THE THEMES FOR MINI JAM 4TH EDITION ARE...
*prepares for complex answer*
Your statements are very accurate. However we here at mini jam, would like our participants to have easy to comprehend requirements. We are trying to make an simple, short, and enjoyable experience, rather than focusing on accuracy.
We believe that two layers are easier to understand than three, and since the jam is only 2 days long, well, less is more.
If you wish, you can use more restrictions for your game.