I set bounciness on 1 , but my ball was bounicng higher every bounce. I changed collision detection from discrete to continous and it started working partly, ball was bouncing once higher once lower./uploads/db2322/original/3X/5/0/5036cc5e16ac49288c7ee61257257975e704bb6c.mp4
Same problem here. I was looking at some notes on my notebook while the ball was bouncing, and when I looked back the ball was very high, outside of the camera view.
If you look at the physics settings on the ball, there is a drag and angular drag, you can adjust those, if the value is 0 it may gain speed if some odd angles occur, but, if you add a tiny bit of drag it will keep it more in check - I seem to recall from the break out game they make, theirs has some drag.
Sorry to necro, but to anyone who has the same problem the solution may be to set the Rigidbody 2D on the Ball to use Continuous Collision Detection instead of Discreet.