I think I got more time out of it cause I am a noob to fighter games and to joysticks. I played it all the way through on all three levels. The hardest part was the second mission of the easiest level, it took me like 15 tries to beat it while my head and my hand and my equilibrium got onto the same page. But once I got oriented I was able to progress through it pretty well, with each mission being just a little harder than the previous one. Now I can pwn the game on the hardest level, but I got about a week's worth of fun (a few hours a night) out of the game getting there.
Obviously, if you have ever used a joystick before or played fighter games it would be much easier for you, sorta like how I automatically just play Shooter games through on the hardest level, but if you are new to joysticks and fighter games, you might get a good bit more than 4 hours fun out of the game.
edit: Also, after I beat the game on the hardest level I went back and played missions trying to beat all the ground units with my cannon and/or rockets, and beating various missions with different assortments of weapons, which forced me to change-up my strategy and made various missions feel quite different.
Point is, the game was kinda short, but there is a lot to do to stretch out the fun if you get creative, and that is just with single player.