@EzioAuditoredaFirenze I'd suggest using python. It is one of the most popular languages at the moment. It is also said to be suitable for beginners. Furthermore others (including myself, @nterhoeven and @greatfireball) do not use python, yet. So we would all start with little prior knowledge.
There is a suggestion in the gitter channel to reschedule the next HackyHour to the 4th of May due to a conflict with the GSLS general assembly. Please comment via gitter if you do not want to reschedule.
We successfully solved "The Descent" and "Mars Lander Level 1" on codingame.com in coding dojo fashion. It was a lot of fun. We solved "Skynet: the Chasm" only partially. Everyone is welcome to finish it off and present their solution in the next HackyHour #18