you got something here
definatly in it's beta stage here, but i think this could and should be a much larger and better game. little confused why a platypus can shoot though... but yes, music, sfx, more levels and better graphics and you got yourself a decent game. maybe a plot line too?
the only thing is, it's not really that origional. it needs a hook, something to seperate it from the rest. good luck with this, i'll be waiting to see what comes of it.