【1digit + 1digit 30 seconds addition】
Score ranking of Worldwide

user	Score
???	28
???	28
???	26
mas***3	26
???	25
???	23
mas***3	23
mas***3	23
mas***3	22
???	20
mas***3	20
mas***3	20
???	19
???	19
???	18
mas***3	18
???	16
???	16
mas***3	15