Some fluff has happened. The squares will now fall more smoothely and the light squares mix in nicely. I'm thinking of using a fixed seed for the random generator to add the possibility of a learning curve. Could be an idea worth to explore. But for the time beeing just straight 20% of the squares are scorable. 

Speaking of scorable squares: They now puff a little bit. It's not the best particle effect. But it's a start. Eventually it should look like if the catched square is  breaking into pieces. Can't be that heard, can it?

The only real bug I found so far was the rare case when the ball got pushed beyond it's horizontal screen limit. The player is then stuck forever. This should be fixed now. 

A general make over of the code was done. Nothing to see upfront but only keeping things simple and clean makes it manageable in the long run. It's not that the game will get supercomplicated. There's not much more to expect in terms of gameplay. But when I want to add something in months, or even just lose track of the code for some days, I want to see on the first glance how the game is supposed to work. If first I'd have to dig through endless lines of complicated code, I'd lose motivation pretty fast...