It really goes beyond being a clone. It's clear it's purely an asset rip right from the Splatoon disc. It's more than cloned immitation, it's a flat out theft of the game assets used in a very very rudimentary engine.
BUT...it's China. And this is what China has been reduced to. Once one of the greatest civilizations mankind has ever known with absolute marvels of achievement is now most famous for crude copies and can automatically be assumed to steal any designs they gain access to, with governmental backing no less! There are slow grinding gears that keep trying to clean this sort of thing up and get on board with the rest of the world with copyright...but there's too much resistance from the top down. It'll happen...someday...but it's going to be very slow.
Copyright has no meaning in China at present. It exists to protect Chinese companies from other Chinese companies, and is most often used to protect government favored Chinese companies from any other Chinese company. But foreign content has no rights, effectively. And no foreign entity can stop them from producing their copies so they don't care, unless they're trying to get it on the market outside China, then they start to care. China is the predominant reason region locking and DVD/Blu-Ray "Regions" exist to begin with. It's assumed all content there will be pirated probably before it's released, so it's boxed into its own region so they don't flood other markets with $1 copies. They're not the only big offender, but they're the biggest. Anything involving IP rights and China deserves nothing more than an eye roll. There's a reason nobody's eager to sell consoles there after they lifted the ban. Not least of which: To sell a console there it has to be made there, and "approved" (meaning you have to give them the designs and content rights which they'll just clone.)
I wonder if the inkzooka hitbox at least works better? :P