Binary

The highest level I got to was 3 because I kept getting frustrated so I'd quit. The hardest part is when it gives you a really big number, like 248, or a high number that's just below one of the numbers like 127. I really don't like the binary system. To use 5 fingers, you could have each finger correspond with a number and work from there. The binary system is used to code and decode messages used in computers to run applications.