1) two demo level 2) screen for "game stage", "game over" and "game win" 3) NOSO boot parameter to start without sound and sound files git-svn-id: svn://kolibrios.org@5292 a494cfbc-eb01-0410-851d-a64ba20cac60
git-svn-id: svn://kolibrios.org@5253 a494cfbc-eb01-0410-851d-a64ba20cac60