However, rhythm games occupy a grey area. They are not violent, they train hand-eye coordination, and many argue they boost cognitive function. Consequently, Rhythm Heaven has become a flagship title for "unblocked gaming" sites. Students search for "Rhythm Heaven unblocked" because the Flash-based (and now HTML5) emulators run in a browser tab, hidden behind a spreadsheet or a word processor. Because the game runs on timings, not high-end graphics, it loads almost instantly even on school Wi-Fi.
: Since many titles were originally on handhelds like the Nintendo DS or 3DS , fans often use emulators like Dolphin rhythm heaven unblocked