If I understand correctly, you play a red rectangle (that is very brave) that have to fight with other purple rectangles (that are very evil). The rectangles become circles when they are out of the screen. This tree rectangles are in free fall and are going to crush on the ground whatever the outcome of the fight. If this is the case, this is a very good idea ! The main problem is the camera and the absence of feedback. The velocity is too important and our rectangle quickly go out of the screen and then it seems to the player that he can not control it anymore. We end up with the 3 rectangles out of the screen without knowing what to do.