Was it majorly bugging out? Like, player flying all over the place - I've experienced a game breaking bug like that if you repeatedly focus the window before the game starts.
no everything was normal but when i reached the exit it would play the fail sound and restart the level instead of going to level 2.
i tried all the ways i could of ending the level while completing the circuit and i thought i didn't understand the rules until i realised it was a bug and refreshed the page. i haven't seen that bug again since then.