Cute little game! I like the concept of trying to stay in the shadows to keep your score from degrading. The player model is also super cute!
My game also initially had issues with freezing when the player would play the game on web. What fixed it for me was preloading all my particle effects when the game started. I assume that the walking particles for the character is what causes the initial freezing, so maybe preloading those when the game starts would help.
Overall really good job! I'd love to see what you make next!