Our hero Mike is heading to Crescent Island, or C-Island, to meet his uncle Dr. Jones at his laboratory while on vacation. Little does he know that a grand adventure is about to begin...
Chapter 1: Prelude
West of the helipad where you start at is the village of Coralcola, which is the only place that you can go to in the meantime. Once there, you can talk to everybody by walking up to them with the Control Pad and pressing the A button. By talking to people, you'll learn that Dr. Jones has been solving some sort of strange puzzle and that shooting stars have come down from the sky recently.
You'll eventually want to enter the hut in the northwest corner of the village and talk to the village chief. Chief Coralcola will tell you that Dr. Jones has been abducted, and that you are the only hope of saving him. Select "Yes" when asked if you are going to save him, and the chief will give you a yo-yo. This will be your main weapon throughout the game.
After talking to everyone in the village including the chief, you can go to the hut in the northeast corner of the village that is being guarded. Since you've talked to the chief, the guard will recognize you and you can enter the island tunnel.
Once you enter, you will meet the chief's sister, who is the village shaman. She will tell you that Dr. Jones was abducted because he found a secret in the lost ruins, and warns you to be careful.
Island Tunnel
At the bottom of the screen, you have your inventory (including the yo-yo), your current health, the amount of potions you have, the amount of stars you have and the amount of lives you currently have. If you lose all your lives, the game is over and the shaman will revive you, allowing you to try the current dungeon. Beware if that happens; you will only have so much health if you are brought back from the dead.
The Control Pad lets you move around, while B lets you attack with the yo-yo and A lets you jump. When you are on the block-like platforms surrounded by platforms, you can jump one-block gaps. Any larger, and you'll fall into the water, which instantly kills you. (Why can't Mike swim?) If you die, you're going to have to start over from an earlier point, and you will lose any weapons and items that you had other than your yo-yo and with less than full health. The movement in this game is very grid-based. By pressing a direction, you'll face it, and by pressing it again, you'll move one space in that direction. This makes it easier to aim the yo-yo at times.
The first enemy you'll meet is the slugs. They move very slowly, and they fall quickly to the yo-yo. If you're at least two spaces away, you can hit them even if they're between grid spaces.
In case you get trapped in a room full of enemies, you'll have to defeat all the enemies in order to get out and continue through the dungeon.
Enemies will rarely drop hearts. If you pick up a heart, it will refill one heart of your health. Collecting five stars will refill your health.
By jumping onto tiles, whether they are surrounded by water or not, you may uncover a hidden switch that is signified by a picture of a foot that pops up when you jump onto it. This will cause a button to pop up somewhere else, and if you jump onto that button, you may open up a door to another room somewhere. Some doors will close behind you, forcing you to go forward, so be careful.
The rat takes more damage that the slug and moves a little faster, but it's still easy to kill.
The torch is a throwing weapon, and you can switch between it and the yo-yo by pressing Select. You only have a limited amount of them, so save them for when you need them.
The bats fly around diagonally and are pretty slow. They eventually slow down and come to a stop, giving you an even better chance of hitting them.
The cobras face a certain direction, and rush at you when you are directly in their line of sight. Sidestep them and hit them twice to get rid of them.
Before entering the boss room, there is a switch you can trigger. Go back to the east end of the room. You'll trigger another door to the east as you do. Inside is a potion you can jump to. Grab it, then go north. There will be another room to the north with another potion that you can open up by jumping on tiles to find a switch, and you can go there grab as well. There is another switch that opens another door here, and if you go north again, you'll jump into the water and die as the game's means of punishing you for being too greedy. So don't do that.
It should be mentioned that items you find in one dungeon will not carry over to the next, so if you have anything left over after completing a dungeon, you won't be able to take it with you.
After fighting some more bats and snakes, you'll fight a giant snake. Equip the torches. When the snake opens its mouth, throw a torch or two at it, then jump to the side to avoid being cooked by the fireballs it spits out. If you lose too much health, you can pause the game and press Up or Down to see more of your inventory, From there, you can select your potion and press Start to use it. When the snake turns bright red, the snake is history. Go north and go switch hunting so you can get out of here.
Once you're back on the overworld map, you'll get points depending on how well you did in the dungeon (which are useless), then you'll be able to explore some more. You'll now need to move north and talk to the guy on the beach. This is Baboo, Dr. Jones' assistant. He will tell you about Dr. Jones' submarine, Sub-C, and tells you that the code to start the submarine is 1492. You'll have the ID code. He tells you more, but is afraid to say anything and lets you head to the lab.
When you head to the lab, you'll be in Sub-C, and you'll see Nav-Com, the navigational computer of Sub-C that looks a lot like R.O.B. the Robot. You'll input the ID code, then you'll end the chapter and head to Chapter 2. You'll leave C-Island as the villagers see you off, and the adventure continues.