Level 1:1-10(easy) Level 2:1-100(normal) Level 3:1-1000(hard) Level 4:1-10000(very hard) Level 5:1-100000(very very hard) Level 6:1-1000000(harder) Level 7:1-10000000(hardcore) Level 8:1-100000000(mix)
I can say level 4-8 is very very hard,can you? You can remix.
