I made it at last , from a game that isn’t playable to a one that can be called a game at least
it was my first jam using pure programming without engines (will, I still used Libgdx library)
I found it very fun and challenging  . It drove me to learn more about Libgdx , things that could had taken more time from me .
you may have a try here

(and read the description)

http://www.ludumdare.com/compo/ludum-dare-29/?action=preview&uid=17923