Well if you want a bigger chance to win, I'd recommend to focus on one game and make it look more pretty and play more fun. Now users will vote on one of your 4 games, but the resulting votes wont(?) be added together, so you'll end up with 4 times an average voting result rather than one good voting result. Unless all of your games are under 100 lines of code together?

Not entirely sure if all of your entries count as one in the poll, perhaps george knows the answer?