Party Ideas

Hi I`m turinging 12 years old, And I`m gonna have a boy/girl party< and I don`t know waht to do, Cuz some of us were thinking about to play 7 mintues in Heaven, Truth Or dare, spin th bottle, and snowball I`m plainning to have 5 girls and 5 guys, well 6 guys and 6 girls including me, And i need help on like what games we should play and what kind of food, and music i should play, and what kind of decortations i should have in my house, so please help me! i need it bad, and i dont want it to be expenisve. And also , should i wear a dress, skirt or some shorts and pants or what, Well thanks