Not really what I wanted to propose, with many difficulties for me (not a coder). On this version, collisions are not working for player, shooting have no effect, and I haven't time to replace ennemies by Bitgem Zombies as I wanted to do.
Instead of shooting with bullets, I would like to put "volleyball shoot" on ennemies. I would also like to put "trampoline" and other parkour abilities. I learned a lot from this first Game-Jam, but not fast enough.