We haven’t written about Tzai Entertainment’s music-powered Shmusicup in a while. Here’s some Arachnid boss footage to change that. As you might recall, Shmusicup is a PC indie game that determines bullet patterns based on your music playlist.
Shmusicup lets you choose from enemies of various difficulty levels to fight against, so you can still listen to, say, fast metal, and not have the game turn too hard. Conversely, you could also choose to make the game harder while playing slower music to affect bullet patterns.