Really like the concept for this game! It's so simple but it was a lot of fun! Though I did find there were dare I say it too many particles. Having the particles appear when the circles spawn and when they disappear isn't great. If you had kept it to when they spawn you could instantly have a warning. The art is so simple but I love it. Great job overall! (Also I love the way the enemies spawn on beat with the music. If this is not a feature you should make it one lol)