What a shame. I don't let my kids play video games or watch TV Mon.-Thurs. when school is in session. Even weekends I limit the amount of time, because one of my kids would never do anything else, and gets really cranky if he plays all day. However, most of us have some kind of stress reliever hobby, whether it is playing VMK or bike riding or flower arranging or whatever.
Are you playing VMK with all of your free time? Have you stopped doing things with your friends? Dropped other interests? Maybe your parents are worried your focus is too limited.
When I was a kid (a llllloooooooonnnnnnnnnnggggggg time ago), my older sister loved to read, sci-fi especially. My parents took away all her books one summer and had a bonfire. Really! They felt she was only reading. Not getting any exercise. Not doing anything with her friends. I thought it was crazy of them at the time, and my view hasn't changed over the years...even when I have kids that age now. There are periods of time when life is stressful. Adolescence. The junior high scene (not the best exhibit of human behavior).
My husband dislikes video games and all things Disney, so your parents aren't unique.
Can you talk to them (calmly!) and ask what their worries are? Maybe they think you are spending too much time alone with your computer. Try to work out a reasonable compromise. Maybe play one hour each weekend day. Then show your maturity by not complaining about the restriction, and go out and do some of the things they DO approve of. You have to work with them. Show them you take their concerns seriously.
For the most part, parents want what they see as best for their kids. They may be right, or maybe not, but they have lived many more years than you (the human brain doesn't go through its final stage of development until you are college age). Either way you are stuck with it

so get to work, kiddo!