Unfinished

This is a yet unfinished game which i wanted to make as a school project, i have a problem with the Bulletwhich flies just in one direction but it is supposed to fly towards the other player. Another problem is that the classes Zyklop and Zyklop 2 shouldnt be able to pass through the Tile.class but my turn(); method doesnt help much :D also there is a problem that the terminal window appears every time when a player (or actor) should disappear....please dont punish me because im a total newbie and i would be really lucky if u could present me an answer for even one of my problems :)