From the HABA USA game page:
There is a treasure hidden on Wally's Big Island! Only the brightness of the lighthouse keeps the water rats away. But oh dear! The lamp is broken and the water rats are soon setting off on their sloop. Then, the experienced lighthouse keeper, Wally Walrus, has the rescuing idea: let's quickly build new lighthouses on the neighboring island. Quickly roll the right colors on your dice to construct the lighthouses block by block. Will you manage to finish all the lighthouses before the water rats reach Wally's Island?