The graphics of super Mario bros 2 are great, almost perfectly drawn!

The sounds are great, too! Gotta love the subspace music!

The story of the game is amazing, 4 heroes trying and succeed to free the subcon from evil, that's such a good story for a good game.

You won't be able to stop playing because this game will "keep your eyes glued to the Television"! One by one you play, one by one step will you get further each play.

The game can be hard at times, but there are 20 levels to get through with only 5 lives, but you only have 2 continues! If you lose your continues, guess where you have to go, Back to the title screen!

Overall, it is a good game, but it is hard sometimes, but I have never beat world 6-1 with warps, need more continues, infinite is good.
There's other things, like different characters having different abilites, I'll point them out:

Mario is the average character allaround.
Luigi runs slower than Mario, but can jump the highest, he kicks his legs so he falls slower. He plucks a little slower than Mario.
Toad runs really fast, he plucks the fastest, but jumps low.
Princess can float in the air at the peak of her jump for 1 second before she starts falling. She unfortuantly runs the slowest, plucks the slowest, but she's a little higher in jumping.

Wow, this game is great, and speaking of great, I can also review super Mario bros. 3 if you want me to.