I don't know about "improve", but if you want music or sound fx I'd be glad to help :)
Hi, at the moment I'm not home so I can only give you some links of projects I've worked on (not all but let's keep it short)
http://lookcloser.fr/blog-single_gb.html
here's a link to my soundcloud page; it has a variety of pieces that I uploaded, so you can have an idea
https://soundcloud.com/giulkau
For the prices I usually work them out project by project. With the last one I've worked on we agreed on 35 euros per minute of music made (it can change though)
The only thing I can say for feedbacks is everyone was satisfied of the final product in the end :)