Try to capturel the radioactive Norwegian crabs by moving your handsite over the crabs. You only need to move the mouse.
You can easily mistake a jellyfish for a crab, in which case you lose valuable time and score no points.
The more crabs that are on screen, the faster the time runs out. If you have not captured all the crabs in time, they will escape.
You have to capture as many crabs as you can before time runs out. If you catch enough, you get to eat the crabs and see the defeated Radioactive Norwegian Crablord.