I'm considering buying an arcade game, and I want one that will last a while. I already have Geometry Wars 2, N+, Braid, and Ikaruga.

About 14 levels.

"About 14 levels."

And it's about 14 relatively hard levels too.

I still haven't beaten it and have owned it since it released, so to me the game is at least a month long.

It really depends on how fast you pick up the mechanics of the game and how good you are with them. If you pick them up fast you might get through the game in a week. As  Vaxadrin also said, you could also go for a month before beating it. I'm in that same group. There is replayability especially in the challenge rooms they give you. Plus, trying to find the 4( I think it's 4 ) special rooms can add another week on. So I would say your looking at a good ammount of time and replayability with this one.

"It really depends on how fast you pick up the mechanics of the game and how good you are with them. If you pick them up fast you might get through the game in a week. As  Vaxadrin also said, you could also go for a month before beating it. I'm in that same group. There is replayability especially in the challenge rooms they give you. Plus, trying to find the 4( I think it's 4 ) special rooms can add another week on. So I would say your looking at a good ammount of time and replayability with this one."

There are a lot of collectibles and upgrades that will have you go back into each level, and with the 56 Challenges and local multiplayer, it's not a short game. You could also try the game on Super Hard like I did, that'll probably require a year or two of practice :| I gave up on Super Hard, but I did do Hard....