The in-game graphics are rather bland and mainly consist of one of two static backgrounds, a clock-like dial, and Britney, however the true star is the animation.
This is one of the most well animated games I have seen on the GBA. Every dance move flows smoothly into the other - even when she stumbles. It's unfortunate that for most of the game you are so focused on the rotating dial, that you won't notice Britney dancing.
Since this game is based around music - you would expect good sound effects. Britney's Dance Beat does not disappoint - unless you are expecting CD-quality music. Instead, the game contains very nice instrumental renditions of five of Britney's songs: Hit me baby one more time, Slave 4 U, Oops I Did it Again, Stronger and Overprotected. Each song also contains a digitized sample of the 'important' parts of the songs. If you have ever played Moonwalker on the Genesis, the music is very similar in quality, only a little cleaner.