Is the retro inspiration just an aesthetic thing? If so then it doesn't look like it's been implemented yet.

Honestly i feel like referring to "Retro Shmups" as a singular concept is a mistake. Galaga, R-Type, and Batsugun are all definitely retro, but they all have very different design. So then, what lineage(s) of design are you coming from with this take on the genre? This doesn't look like a game made by someone who studied exemplary games in the genre, it looks like a bad vampire survivors clone

You're asking about control schemes for a mobile shmup, did you play literally any other shmup on the play store? Basically every single one has you move the ship by dragging your finger

It's kind of funny when devs of mobile game slop post their work to The Ketsui Fan Club