Just long enough to relive some of the NES glory days.
To start off this game has only three levels, but those three levels are very fun if you were a gamer in the NES era. The game is short and sweet and straight to the point. Each of the three levels are the same where you have to get key cards before you fight the end boss. The levels are decently big for trying to be an NES game but it ends up being repetitive in the end. Every boss battle is exactly the same and pretty easy after you figure out the pattern. I did enjoy this game but I do not find myself replaying this one since I have already beat it. I do not own Dark Void for the consoles but I might pick it up sometime, but from what I have heard and read is that Dark Void Zero is far superior to its console counterpart. For everyone with a DSi I would still pick this game up and for $5 it is worth every penny.