I only had a few hours for the duration of the jam so I had to scope low. It is pretty much the core mechanic and polish. I had ideas for other gameplay elements but I am also pretty accurate on estimation so I left it as is with just a few showcase levels. Except that nobody wants to waste his time on only one game in a jam where there are plenty.
If the game is easily completable in a few minutes then it's great for the jam.