I like the theory and the working tutorial. Didn't realize how much nostalgia a little Asteroids game would generate. Well done in the time, for sure; a little more polish and it's a nice little game. In some cases, I think the hitbox of a smaller asteroid formed by a previous hit seemed to keep the parent's hitbox. I'm not sure about the rhythm connection. Might want to consider a metronome/aural component, the bar at the bottom of the window was distracting at times. Also, gratz on submitting - just getting it done and mashing the 'submit' button is a win!