Considering that Azur Lane itself plays somewhat like a shoot 'em up I honestly think this was bound to happen at one point. Kinda wished there was a system that mimicked how Azur Lane sorties the boat girls having 3 characters in front and 3 characters in the back but still it seems to still have an idea about how Azur Lanes game play works, even if it's being spliced with Touhou's general mechanics.
Also call me out if I'm wrong but I love how we have a Touhou x Azur Lane fan game like this but not a Touhou x KanColle fan game like this.