hey, happy to try to help with this. can you explain in more detail what stuck means?
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?