Is a Masters in Computer Science hard?

Hey guys, next year i start college and wanted your opinion on the difficulty of what im going for. i have my mind set on being a "real" game designer so to do that i want a Masters in CS for a total of 6 yrs in college. The question is simple is it as hard as most people say? to give you an idea of my math level, i got As in math up till 10th grade, and only got a B in 11th due to having a very very good precalculus course that was hard at the time but good now that i look back on it. I've never programmed much, but i have a programmer mind, such as when an english teacher says that the rules of english are this, but when she says there are exceptions, ill question why the rule is broken and etc... Also for my senior year, this year i will be going to college for my senior year (is a dual enrollment program) and will be taking calc I. i feel im not stupid at all and i have a drive to do what i love, make games!