Need Party Game Ideas And Food Ideas ASAP!!!!!!!

I need to know some great party food and game ideas!!!!! my birthday party is in a weeek and a half and im not sure what to do. Im having 55 people at my party it is going to be huge it is my 13th and we are in 7th grade. The party is at a local historical house with a park and all that so we have TONS of room to have big running around games and stuff. It is coed and im really hoping its a blast! plz plz plz plz plz help me everything helps i just need to know some good ideas esspecially game ideas