Steve Jobs even demoed Tap Tap Revenge at an iPhone keynote in 2009! Our little game!
IGN gaves us a 9/10 when it was released: https://www.ign.com/articles/2008/12/11/tap-tap-dance-iphone...
> At the end of each difficulty tier, you unlock a new song that's accompanied by art specific to the track. Daft Punk's "Technologic," for example, has an old-school TV screen that flashes images and the band's name as notes stream down bars that are much shorter and shaped differently than the main game screen. Moby's "Disco Lies" also uses short bars that unfurl from what looks like the mouth of an alien designed by a nine-year-old using MS Paint. (And that's not a slam to the artist -- I think it's very cool.) Once you finish a boss track, that song become parts of the track list on the next tier.
> Unless you want to stab your ears when you hear techno, Tap Tap Dance is the best music game on the App Store right now. The note placement and control sensitivity is just right, making it instantly playable to anybody. But Tap Tap Dance doesn't hold its fire. By the time you reach the hard tier, you are getting a serious thumb workout. With excellent song selection and super-cool graphics, Tap Tap Dance is a pleasure to recommend.