Sorry for the question (i am spanish and dont know much english, so if i express myself stragely, i apologize; i am using Google Translate) I am trying to earn money to go to university. Does this game jam offer any prizes for the winner, or is it just for fun?

There are prices to win, but they are not cash prices. You can check that on the main game jam page under Sponsors:

/jam/theveryseriousjuniperdevgameja