Circle Moves Onto Screen At Angle

Hello! I just had a quick question. Is there a way to have an object, such as a circle, come from an angle onto the screen? Then, would it be possible to have that object stop moving after a participant presses a key, such as the spacebar? Would this only be able to be done by using code only or is it possible to do in the builder as well?

Any advice would be appreciated and thank you!