How do I increase the coin income per tap?

In his presentation of the Curiosity app, Peter Molyneux said that there are ways (based of rhythm, maybe?) to increase the amount of coins you earn, per tap.
Also, in the "info screen" from the Curiosity app, it is said that
there are skill mechanics that you will need to master
Tapping one cube brings one coin, basically.
What are the ways to increase that amount? Are there combo mechanics, rhythmbased scoring?

So far I've discovered:
Combo multipliers: you get a multiplier increasing, as long as you tap without missing, and you tap one new block in the next 2 seconds after tapping one.
So far, I don't manage to find the logic behind the actual number of cubes for the multiplier steps, but here goes for the first ones:
 2x: 12 cubes
 3x: 26 cubes
 4x: 42 cubes
 5x: 61 cubes
 etc...
"Clear Screen Bonus"  What it says on the tin. Clear your whole screen of cubes and you'll get some coins as a bonus.
The amount is equal to the score you earned on clearing those cubes in the first place (including the bonus from the multiplier), multiplied by 10.