As you may be aware already, I love Cave Story. This video is of the WarioWare D.I.Y. microgame that Pixel, genius behind Cave Story, has made available to download. The Ikachan microgame is based on a mechanic from a PC game Pixel released in 2000, which shares its name.
Based on a mechanic from that older game, you have to tell the three young squid when to go hide in the clamshell which matches their color. Then, sometimes when you're successful, a cat in a bathing suit wearing a snorkeling mask swims past. It's exactly the sort of thing you would expect.
You can download Ikachan and play it for yourself through WarioWare D.I.Y. right now.
WarioWare: D.I.Y. - Pixel's microgame [GoNintendo]
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