Sorry to join the discussion a bit late! Dave Invaders is amazing! The graphics and music are fantastic and the playability is spot on! Every go leaves you with that, "next time I'll get a bit further" feeling... I've got to level 4 so far!
Great work Andrew! You've really given me something to aim for, particularly in terms of making a game that's fun to play. Can't wait to see what you do next! Rob.