In your case, I experimented the bug on mobile, going back and clicking "restore game" seems to "fix" it.
Viewing post in Strange behavior with the game in the Browser
Alright, thank you for this feedback.
It's quite puzzling that the page occasionally loads with bugs, considering it's the same game with the same source files...
I hope you were able to enjoy my game, especially the time invested in making it mobile-compatible ( getting the double touch to work smoothly was quite a challenge, and I had to create a special extension for it ) !
PS : Out of curiosity, which level did you manage to reach ( it seem a little harder on phone so I'm curious ) ?