Caveblocks

Block-Barney could not lay bricks very well. The walls that he built often
collapsed or let the wind blow through. He fancied to marry the beautiful
Bogey-Betsy. Betsy said, that if the walls are not waterproof, then she
would not agree to marry him. Help Block-Barney lay nice brick walls!

Directions:

Right arrow moves the block to the right, left arrow to the left. Down arrow
speeds up fall of the block and with the space bar you can turn the block.