Tilt-a-Ball has many different sets of brick types too.  Each brick type has its own unique characteristic.  As you progress through the levels in the game, new brick types are unlocked adding variety and additional strategies to beat the higher levels in the game.

Brick Types

Gold Brick	The standard brick
Blue Brick	Absorbs 75% of ball speed
Red Brick	Super elastic collision, the ball bounces with a 5X speed multiplier
Purple Brick	Gravity amplifier, temporarily increases gravity which gradually returns to its normal state.
Silver Brick	Hardness brick, ball must be traveling fast enough to destroy it. If the ball is not traveling fast enough to destroy a silver brick, the ball type advances to the next ball type.
Green Brick	Only a green ball can destroy a green brick