Select a quick answer to random problem before the Time Bar disappears.
Click answer on the block above problem!
When you hit the answer block, The combo will stack!
but hit the wrong answer, combo will break.
If the combo is 6 stack, Fever Time!
FeverTime gets more scores, and stop time.
+) Added Google Login
+) Added ranking borad
+) New UI design.
+) New effect sound.
+) Add background music
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