Last year was my first time doing a game Jam, however I wasn't working at the time, so I was bale to dedicate my fulltime behind it. This year I've signed up but it is right before a conference I need to attend so this is going to be a hit and miss.
All I can say is Keep It Simple S*****. May not win the jam but it'll give you something to launch from latter or at least give you something to add to your portfolio