The gameplay is simple; it holds the premise of using an array of characters with different abilities to solve the puzzles that compose the different levels of the game. Think of Lemmings but without the suicide concept present. The game mixes elements of adventure also, because it tells a story during the game progress. The title is not a typo, those three Is reference the three characters you use trough the game.
As it was said previously the three Goblins BoBo, Hooter and Dwayne must help the king, but the three main heroes have different abilities: Dwayne is stealth, Hooter is a magician and BoBo a technician. The player has to mix the abilities of the characters to win the levels, although sometimes the player can only use one character at a time depending on the scenario rules.
The graphics are a 10, really delectable and attractive to the eye. Almost any scene of the game is really attractive because of one reason; they were drawn by hand by French artist Pierre Gilhodes.
The sounds and BGM are really good and they match the actions of the game, i.e. firing a cannonball sounds like a real cannonball; and that is a big plus because they give a dose of realism rare for the time.
There is one negative aspect in the gameplay: the player needs to win certain number of scenes before obtaining a password that will give to him the opportunity to save.