I enjoyed it, exhausting but interesting experience, a lot of emotions.
I've seen friendly people, opened for critique, dishonest people - voting on games they didn't play, talented people with their innovative ideas, enthusiastic people with their more or less polished works.
I learned you really need to do some marketing to get your game noticed.
I learned how to make 3D game with blender and how to use vector graphics.
I discussed games with people who are actually interested.
I made a game and some people actually played and gave me some feedback.
I learned a great humility lesson after the results were in and feel great about my result now (after I went through all the stages of grief).
What I didn't like was the rules. The reviews could be falsely positive, making people prone to leave positive return rating. People could even get 20 positive ratings by simply complimenting games they didn't play! But I don't think you can do much against human dishonesty, and it's a good place to learn about it before you start some indie gamedev endevour. Life is brutal!
I will eventually take part in another jam, but now I have to seriously rest for a while :D
Thank you all!