If you haven't heard of metal slug then you should play this game..just remember the neo geo version is 3 times as fun
so those were the technical issues. as far as the games content...the default setting has infinite lives and you'll beat the main game in less than half an hour..so at that right there I tell you DON'T EVER BUY THIS GAME...especially if its over $5.00 or you collect stuff. If I were you I'd just download and burn the game or run it in an emulator if I was you. I'm not saying this game is crap...its basically the best side shooter I've played and its hilarious but its not worth paying for just half an hour. basically this game is a good introduction to the neo geo games and is a good poor mans fix since the neo geo's goes for like 800 bucks on ebay.
VERDICT: don't pay much if anything for this, play two player, make sure to play the real neo geo FIRST cause you'll Finnish this one no matter what....oh and its a good game for a girlfriend..mine loved that it was short and she could complete it with me.