Lizard Game Engine (.blend .dae .fbx .obj .3ds)

Good morning everyone! We created a 3D model of a lizard (Podarcis sicula) for a previous project, already having the shelter for the future animation. For an università project, we need a little Game Engine in wich the lizard, commanded through the directional arrows or W/A/S/D, will only walk on a narrow black surface (black as the background of the scene) of 22 cm x 7 cm, with no possibility to fall down. The camera visual on this area will be fixed and placed on the long side (22cm) and it must be ortogonal to the pathway of the animal. IMPORTANT: the movements of the animal must be as real as possibile (watch the video attached). When i twill get next to the end of the surface it should stop and the head must always follows the direction choosen for the movement (no reverse motion effect). The lizard we need must not be able to walk out from the visible scene e and the background, as already told, must be completely in order to better contrast the subject in movement (explaining Sketch attached). Obviously we’ll give the editable 3D model as: .blend .dae .fbx .obj .3ds ...And al the starting texture as .png ...We also need a change in the “Texture Color” file in order to have the 3 different couloring of the abdomen of a Podarcis muralis lizard (look at attached photo: White, Yellow, Red). Thank you to everybody who will consider our offer!