These items award you large amounts of points upon collection, but are all very difficult to find.

Item	Location
10,000,000 Points	Clear Stage 8-7.
111,110 Points	Destroy all other blocks before destroying the block covering the exit.
123,450 Points	With one enemy still left, stand on the exit when the clock reaches 3:33.
18,800 Points	Destroy all blocks without destroying any enemies.
24,800 Points	Don't move for three minutes.
39,800 Points	Destroy all enemies without destroying any blocks.