No it's not. I'd highly recommend playing it - it's a phenomenal game. It's not a dual stuck shooter, you can literally play it with one hand. The entire schtick of the game is that it auto fires, so all the player takes care of is mobility. It was inspired by the exactly one other game that seems to have created the genre - Magic Survival. But Magic Survival was a mobile game so it was full of ads, spam, microtransactions, and all the other sort of stuff that enshittifies everything on mobile.

But the dev nonetheless thought it was a great and underserved idea. So he cleaned up the concept, got rid of the ads and other mobile crap, brought it to PC, and made $millions. His idea was then widely cloned, but games are much closer to art than commodities - so one can't expect clones to do as well as the 'original work' when they're being sold in the exact same gallery. That said, some of the clones also did extremely well when they meaningfully iterated upon the concept instead of just outright mimicking it. For instance Halls of Torment is another great game in the genre.