(I actually haven't played Xenoblade, but damn, the Red Blade really is similar to the Monado in some ways. Nintendo pls dont sue thx)
I'm happy that you gave the game a go despite not playing games like that much, thank you for playing and the kind words! Player and bullet visibility is definitely one of my main concerns (and I wish Touhou, among some other bullet hells, tackled it better). It's not done perfectly in Rotschwert and there are some areas to improve on, but I'll do my best to do so while preserving the aesthetics and game vision as much as possible.
I'm also happy you enjoyed the music - I've used free BGM from several Japanese composers, and it's insane how they're willing to share their masterpieces for anyone to use. EN_OKAWA's music in particular inspired and empowered many of the game's elements with its energy and feel, I've put down the credits and links in the readme so check them out if you like! (though you may need to use a translator unless you know Japanese)
Again, thank you for playing and taking the time to comment! It's very empowering to know that not only bullet hell aficionados can enjoy my games ^^