The torture of physics (Density chapter)

Attention please! 

This story is a small piece of a demo version of the bigger game about physics. The purpose of the game is to make learning science interesting. Before you start I want to say that for making that game happen I need help from each and everyone of you. This is a link to a survey:click here You can also find this link in the description box and at the eng of the game. I encourage you to fill it in and send me back. It will help me create the best game I can.