Remarkable:
Letting the player choose the angle they hit the ball at makes each experience of the game unique, and adds a certain challenge that I wouldn't have expected to encounter while playing these games. The movement of the paddles is smooth, but fast enough that you're not unable to reach the ball after certain hits. Each level is unique enough that the experience doesn't dry itself out after the first level.
Needs Improvement:
The ball doesn't always bounce high enough in my opinion, which makes certain levels feel a lot harder than they need to. One level has two platforms that the player can control and the ball barely reaches the second platform if both are flat. There aren't many things you can attempt that will make this less of a problem, aside from trying to push the ball in a horizontal direction. If the ball bounced higher, you'd also be able to pick the speed up, as sometimes the game feels slow trying to reach the goal from the same spot over and over again.
Successful:
The angled paddles work almost perfectly, as none of the hits send the ball in a direction aside from the one you would expect it to. Finishing a level puts you onto the next level really fast, but doesn't surprise anyone by actually starting, which allows the player to move at their own pace.
General:
It's a really cool concept, certainly not anything that I had even thought of when drafting game ideas. The game itself makes it very unique, and having that much control over the paddles makes the game more reliant on the player than it does the physics of Unity, which eliminates a lot of the frustration that can come with hitting objects at an angle. I did enjoy playing through your levels, I do think the game would benefit from more movement in terms of height and speed, although that might make the game easier than you want it to be, which is perfectly understandable.