Frustrated!

I am very frustrated with the codes on the powerade zero the letters of the codes are very hard to read because the code color is about the same color as cap. If that wasn't enough when I try to enter multiple codes after entering a successful code how come the cursor doesn't queue up in the next box. There have been several times when I am doing multiple codes that I enter a code and i look up and the code never entered because I forgot to click in the next code box. I find it very hard to believe that just about every other website that has entry boxes can queue to the next box after entering the required data but yours doesn't. why have multiple code entry option if you are not going to make it user friendly?