The only argument is that UFS is a Flash game played inside a browser. Most computers have Flash Player, so it's an open choice compared to the listed games like that, as they require downloading.
Though, it's not hard to play something like... well, Sonic Advance, inside a browser. Websites exist that are literally online emulators, so it's possible to play Megadrive, NES, TurboGrafx, GBA, etc. on any computer that has or can run Java.
Back in 2004, sure, UFS was a nice little homage, and a good choice to break the dull boredom of a school day in that off chance you had a computer class, or free time involving computers, but in 2014, there's no point in playing it when you can play all three of the games that inspired said Flash game... and were better because they were the originator of it altogether.