http://gamebucket.io/game/49eb7afa-6235-4dbe-990a-820af82c3817
It’s mostly the way it was created in the tutorial. I added some things. Most importantly, I added power-ups. Red en green blocks drop more interesting things than yellows. 
I also added some awkward angle correction, that makes sure that the ball always has an angle greater than 20 degrees from the x-axis, to avoid tedious waiting on balls.
I’m sure it’s still riddled with bugs. Sorry about that in advance. 
Nice! The power up are cool! I think adding a nice background image would help the enjoyment of the game!
Tnx! Yes, different BGs would be an simple but effective improvement. Tnx for the tip.
oh man the power ups are great especially the spawning of the extra ball. I can’t wait to know how to do stuff like that.
Tnx! 
Once I finished the tutorial, it’s actually pretty easy to add.
Basically all you have to do is instantiate a new ball at on the paddle and call the launch ball code (which you do have to adapt to take a specific ball as a parameter). And you have to change the lose condition. Instead of having the game end when a ball hits the lose collider, I added a ball counter, which gets incremented when a ball is added and decremented when a ball touches the lose collider. If the ball counter hits zero, the game ends.