for a first...
but you have a long way to go...
graphics: the walls are really choppy and cheesy looking, and next time i would advise not useing a gray dot for a finish on an avoid walls gamewhere the walls are real close to that color, try a green or red colored one next time.
music: add a "pick a song" option or a mute button ( or both ). oh and if you pres play again at the end it overlaps, BADNESS
playability: very easy to cheat through by either right clicking or pressing tab.
effort: i cant detect much effort was put in this, however i am aware that
try improving in these feilds and you'll get better