Ah, good old non-deterministic Unity physics XD The game is still quite fun despite the fact that each run is slightly different.
I found myself hooked quite quickly. I really liked how easy it was to change the setup and try again and again and again. The sound design is done well too - it's subtle but effective. My only complaint is that because of Unity's physics I had a hard time setting up the walls to change the trajectory of the ball. You could try increasing the # of solver iterations which might impact the performance a tad but would make it more deterministic. Or maybe you could change trajectory by using some other clever trinket.