Android/iPhone Kids Game - Draw Train On Canvas

Reference application: [login to view URL] Requirement: - Launch the application shall play a sound with a logo - only 1 scene: a green land - kids draw a line with start point and end point on the screen, the application will render 2 tunnel entrance and a railway on the screen - the train (locomotive only, no cart) will climb out of the tunnel at the start point, and climb down the tunnel at the end point, then both start point and end point tunnels together railways disappear gradually - railway can cross each other, and there's option let kids to choose of turning on/off the collision effect - if 2 trains collide, a Bong sound is played, and both train will stop and disappear together both railways and tunnel icon image gradually - drop down menu at screen top for kids to choose the train images to be used in drawing (multiple choice checkbox) - kids can draw curved railways - in case of curved railways, train shall adjust it's top view in parallel with the railways If possible, I need both Android and iPhone versions. It's ok to develop only one version, however the bid price will be negotiated afterwards. Source code shall be part of the project and delivered upon completion.