The shoot ’em up genre, having been around pretty much as long as the concept of “video games”, is relatively set in its ways.
When you think about it, this isn’t all that surprising. When the core concept of your game is as simple as “shoot everything, don’t get shot and don’t crash into anything”, there’s only so much you can do to iterate on that concept. And so most modern shmups distinguish themselves primarily through carefully choreographed enemy and bullet patterns, unique audio-visual design and a sense of “spectacle”. In other words, it’s relatively rare to find a modern shmup that does things a little differently in mechanical terms.
Japanese doujin circle Astro Port is one of a few developers that likes to regularly mix things up in the genre. And its latest release Zangeki Warp is just one such example.