Unique Unity or BuildBox casual videogame

Greetings, we are a video game company that out-sources their projects in order to create a collaborate environment with our international communities and hire potential longstanding clients that will grow alongside us. This next project is a videogame in which we will give you the freedom to develop it yourself, but It must feature a unique game mechanic, using a one button gameplay. The game will be in 2D, however if 3D will be simpler to create then it can be done with such. You will be the programmer of the videogame and will work with another freelancer in the art department, unless you have an artist with you that can also create the art as a team and additional project budget will be added. The game must be completed in 15 days, with an additional 2 days for bug testing and 3 days for publishing (and additional bug testing and features). You must have a Mac, because the game will be launched for iOS and Android - and you must publish the game. Credentials will be included. If shortlisted for the task you will be given a documentation which follows the game design in great detail.