How do I explain Splatoon to a young’n?

I play video games with my 7 year old nephew a lot. Usually games like Rayman or anything from Lego. I've shown him previews of the switch and he's super hyped for it. I can't figure out how to explain Splatoon though. He saw a short clip of Splatoon 2 and was confused when one of the inklings got "splatted" and asked me if they died. My initial reaction was "no they just got sent back to the beginning" but now I'm trying to convince him that he didn't just see a little girl colorfully explode. Does anyone have a better answer?

Discussion started at here by Clownbaby64

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