Random question. What is your monitor refresh rate?
Viewing post in AI Can Make Even Trivial Tasks Deadly comments
This is a problem with the phaser game engine in the version that I was using back when I made the game. I think it has been fixed in the current version but this game is 3+ years old. I'll see if I still have the source code, but this might be lost to a laptop change...
Thanks for checking it out though!