!3th Party-on My Boat…?

ok, i am having my 13th birthday party on my boat that holds 16 people so i can invite 12. I will be going to a beach on it and the theme will be called ‘posh but not’ where the boys will wear dickie boys and board shorts and the girls will dress posh, maybe with a hat and heels ( my mum didn’t like the heels idea as it is a safety risk? maybe just fancy flip flops). My dad is thinking of hiring a friend to take us out on the jet ski. I want to maybe have a barbeque with some nibbles? any ideas for food? i wanted to play some games as well but don’t really know which ones? do you have any ideas, i want this to be the best party ever! I wanted to have a cake but i don’t know what of? i am a girl. my boat has a cooker and a fridge and a microwave, so we can cook food and keep it cool. i want to know what you think of this party idea and any activities you could think of or games to play, i want people to love it soo much. i also have a kayak and fishing rods. i love the colour blue and was thinking of having ‘posh but not’ party invites! I would really appreciate your views and comments please try think of any way i can adapt the idea…xox