Thank you so much for the response. I tried playing the game on another computer, and the same thing happened to me. In the third level, where the stage is bigger and I had to climb a lot, the camera didn’t follow me when I tried to reach the ground again (I couldn’t see what was going on down there).
What I did was take the browser out of fullscreen, and it worked. (I've attached some photos below to show my experience.) but at least it worked for me! Anyway, I’ll ask my friend who knows about programming, maybe they’ll have a better solution.
When you finish the game something special happend in the end :D so if you want to try again in future, you are welcome! :D:D:D!
My photos:
1) Problem = with browser full size( i cant see below):
2) How do I solve : browser minimize size ( i can see below)