If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
The main character awakens in an underground cavern with no memory of how he came to be there. He finds a village populated by rabbit-like creatures called Mimigas, who are being persecuted by the Doctor. Two of the Doctor's servants, Misery and Balrog, are looking for a Mimiga named Sue, but mistakenly abduct a Mimiga named Toroko. The player's main quest is to rescue Sue, save the Mimigas from the Doctor, and escape the floating island on which the game is set.