Hello.
I'm a computer science graduate student with a few years of experience in game development and design.
I will need 20 days to create the game (both programming and art) and, if necessary, a few more for optimizations (reduce number of polycount in some models, enhance some textures to get a better and coherent visual style).
And about the sound effects, I can create all the basic sounds, but I do not have the skills to create the music. So, we will have to get some free for commercial use music, or contract someone to make it.
Also, implementing monetization methods such as Ads and In App Purchase will be no problem.
I can send reports daily so you may send me feedback on the way the project is going and suggest adjustments.