I can imagine; I was in a "let's just chill and see where we end up" jamp group this year and still managed to end up stressed and pulling two all-nighters. FWIW, it was a great entry!
Just to avoid making a fool out of myself: my entry or your own?
Not my best, but not very disappointing either considering there were almost 3000 participants.
The rankings are relative to other participants in the same event (Jam or Compo; Jam in your case); the more accurate number is 1638. There are also unranked entries in the 1638 count; for Overall, this is negligible, but it significantly inflates Humor and to a lesser extent Mood, and Audio is also notably affected by it.
Ah, well. Still not that disappointed. ;p Where can one see how many entries were in the jam specifically?