Special condo blocks that will appear during gameplay can help you in your high score quest. Here is the list:
Acid Condo - These tricky units will melt through the condo below it when the timer reaches zero.
Bomb Condos - You can't swipe these out of the way and they'll tick down towards an explosion that will rattle your precarious tower. They can be removed by matching condo units above or below them.
Cat Condo - These are incredibly handy for increasing your condo upgrades.
Clock Condo - These are great for extending your two-minute match time with.
Concrete Condos - You can't flick this towards the monsters for them to eat, but they will disappear if included in a chain of color.
Multiplier Condo - These are great for increasing your multiplayer if you can bring them into play by creating multiple matches.
Piggy Bank - If your fingers are fast enough to match-up five or more condos in one go, you'll receive a Piggy Bank!
Nuke Condos - Loose these as fast as you can or it'll end your game. One of the ways is by create a match above or below this condo unit.
Upgraded Condos - These are the items you need to activate monster powers, and are created from match-ups.