the task of this game is to find the combination of 0 and 1 which makes a given target number.
if you touch an arrow, the numbers on the line which the arrow indicates will flip; 0 to 1 and 1 to 0.
if the total sum of 0 and 1 on the screen is equal to a target number, you will see the smiling emoji.
the smiling emoji appears for 5 seconds.
target number is from 1 to 81.
contact: sungjun2c2012@gmail.com
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