Breakable blocks can be destroyed by being shot or hit from below with the player's head. Blocks tinged with the secondary color (the defualtcolour being red) will drop 10 gems when destroyed. Landing on breakable blocks will end the current combo.
Breakable blocks also form a 3 by 12 "wall" before the Boss.
When shot, breakable blocks (and any other blocks adjacent to them) will shoot a single shot upwards. This shot has the same size, range, and damage of a shot from the Machine Gun.