Bleh... it's... repetitive to say the least.
The gameplay, to start off with, is very repetitive. In the first level, a cutscene starts, and the game throws you on a car. What you do, is that you have to cross checkpoints in time. After that, is the meat of the game. It's also what makes this game repetitive. It's platforming. Basically, you attack enemies, and you try to get to the finish. These enemies usually take no time flat to beat. You do this for the majority of the game. Last to say, the game is ridiculously easy. Some moments are tough, but, the game basically holds your hand across the way.
The graphics are not bad, but aren't perfect. The animation isn't good at all. A perfect example is at the beginning, when Spongebob's license jumps away. He starts to cry, and get depressed, but he is smiling through all this.
The music is repetitive, and begins to get boring. Since the levels are so long, the same music is played throughout the entire level. The sounds are also repetitive, with that amusing little springing sound when you jump.
The replay value after beating the game is fairly low. After that, you can spend your Z's to get stuff. Unfortunately, all items are completely useless. Most of the time, you will get art to just look at. Unless you like collecting stuff, don't focus on Z's at all. Other than that, that's it.
Overall, repetitive is the only way to describe this. It's a long game, which can keep you occupied. After beating the game, if you weren't satisfied, then the game is trash.