Brick Block is hard!
3 colours = crazy hard, 2 colours = hard, but achievable, and the makings of a great battle.
As I contemplate the variation in game rules, leagues begin to emerge and for something so simple on the surface, there is a lot of raw potential.
I do like the idea of a medative, slow, personal experience. A hike in the forest to the hill's top where you can take in the vista of the achievement. This is a place for progression, 2 colours at first, 3 colours later, and at 3 colours you're up in the clouds.
A race of the mind against an unnamed foe.
This has to be 2 colours, you know you can solve it, but can you solve it first.
Battle is a place for weapons, competition and glory.
There may be an extreme 3 Colour league. Weapons will be critical.