There aren't many games where you have to rescue the Prime Minister from abduction by aliens but that's exactly the plot of the bizarrely named Laser Dolphin.
Laser Dolphin requires you to take control of a dolphin with a laser in order to rescue the Prime Minister from alien abduction and dissection. Standing between your dolphin and success are opponents such as Missile Fish, Robo Birds, TNT Turtles, Electric Eels, and Robo Sharks. Added to this are random enemies which pop out of secret holes and passageways.
Laser Dolphin requires you to travel through four worlds and conquer 50 levels before you'll get anywhere near the Prime Mister, however. Its not actually that difficult to complete a level though which is perhaps why the developers have chosen to include a built-in level editor to create your own Laser Dolphin worlds.
The gameplay is simple and the graphics are cute making Laser Dolphin a great time waster but nothing much more.