It now switches from this mode of click speed testing to too hard. The hardest part is maintaining the same clicking speed until the end. If you practice carefully, however, you will achieve the cps score you desire and maintain your clicking consistency.
Interestingly the game is mobile-friendly. So, the user can check the clicking speed at the given period in the mobile interface also. The mobile interface is the same as the desktop interface, give users ease to check clicks per second.
Model O/D or most Roccat mice are probably the best mice for CPS. By modifying/disabling the debounce, you can dramatically increase your CPS when butterfly clicking or drag-clicking.