Hi there!
Your projects sounds like a lot of fun, and I would definitely like to offer you my services for it! I have 15 years of experience in creating all kinds of stuff, mostly through animation, motion graphics and video effects and editing. I also did my share in webdesign, in times while Flash was still cool :)
Now, as I'm still not sure what your idea about the app is, I can't be specific what kind of implementation I would offer, but you can be sure I can cover you on all fronts.
You can see a lot of stuff I did previously in my Freelancer portfolio, on this link: https://www.freelancer.com/u/ZENdra.html
I'd be happy to provide even more examples of my work, in case you want to see some more specific stuff that's not listed in my portfolio.
So, if you are interested for a collaboration, let's have a chat, so you can tell me more about that crazy app of yours.
Looking forward to hear from you.
Regards,
Drazen Gojkovic