At first i'd like to mention that i can’t start the game on my pc, after clicking on the icon, the game is loading and an error with the content “Renderer process crashed: oom (-536870904)” shows up, so i was playing on web version. i would like to give a few thoughts from my playthrough:
-song should be sorted (or at least have this option available) by the difficulty level,
-the player should be informed in advance what buttons are used for the game and it should be possible to change these buttons
-I felt the amount of rhythm to play does not match with the moments when the lines fall, but possibly it is just an impression
-After playing "Enemy" and launching another mission, the buttons at the bottom of the screen disappeared, it was a single error
I'm a layman when it comes to games of this genre, so it's hard for me to compare this production to other similar games, but overall it was quite nice to play.