I feel like making a 3d game for the n 64 , playstation , gamecube
etc
you can- as stated on the jam page:
How strict are the rules? - This jam is meant to be a laid back experience. The most important part of the rules is that you make a game that accomplishes having the feel of an era specific game. For example, if you feel like bending the rules a bit and making a Playstation style game, feel free! Just try to make it feel like it came from that system, and have fun!