Hey there,
I am currently the lead concept designer and innovations officer for a start-up called Tethir. I most definitely can assist you with brainstorming and conceptualizing the necessary features. I enjoy puzzle games and anything thought provoking in nature. I have an IQ of 140, and possess a high degree of critical thinking ability and philosophical+lateral thought processes. These are what I use to design almost the entire arsenal of features currently in development in my own business.
As for your criteria:
The only thing I lack is the design ability. I am a thinker not an artist but I hope this does not impede my chances. As for english level, I'm sure you can tell I am quite proficient. :)
I would very much like to work with you, as activities such as these are not only exciting and riveting, but also my forte.
Hope to hear from you,
Cheers,
Ruapu