the game doesn't move past the level 1 screen, music keeps playing. tried pressing all the buttons on keyboard and controller. window was in focus
when you say the level 1 screen, do you mean the title screen that says level 1 or level 1 itself? if it's the level itself, are the animations playing? (there should be sparkling stars, characters bouncing a little with idle animations, and a character talking to you explaining the controls.)
which browser are you using, and what version?