As a veteran SHMUP girl but also a casual player, I do recommend this game!
It's got retro graphics but it's intense, it's fun, and there's lots of weapons; even if someone isn't a top shooter, that person still will get even at least one weapon per stage cleared, adding lots of replay value. The further one goes and does well, the more he/she gets better weapons (like in Silpheed: The Lost Planet) and can edit up to four in prep for the next battle (Gradius)
The soundtrack has quite a catchy beat and is quite charming (like in Stage 3 on the Highway Zone, it's catchy!) as well as can get quite badass (like in Stage 2: the Supercell Area), and even up to how tense some bosses can be in familiar titles like Deathsmiles, Castle Shikigami, and Touhou (such as the final boss) adding a hint of sudden hard-rocking atmospheric music to a powerful climax of an opponent!
Speaking of which, the game has a fair difficuly curve as well, one can do quite well in the first few three stages and then it will challenge a/the pilot(s) of the Hangeki fighter(s) to how well he/she/they can fight. Stage 4 is where the action may kick up and become really exciting (in my oppinion).
Make sure to learn how to utilize the fighter's weapon settings well, as the hostiles will not hesitate to litter the screan with lasers and streams of bullets later ahead of the game! There's plenty of lives and infinite continues regardless of not doing so well, so it's also very benevolent regardless of how strong the opponents later can be. Never give up.
There is ONE gripe however, beware of a sudden "Out of Memory!" error which could hit harder than the game's true last boss himself!
Oh but one last plus: Did I forget to mention that one can bring a "wing in arms" along the way locally? (There is Co-Op!) and this will make many of the fights much easier! Have fun!
I will host a video of this game as well eventually.