that is very bizarre. I have tried on chrome/edge and safari on macOS and I’ve had no problems… hopefully whatever it is, it goes away soon. But I’m happy to hear it works on mobile for you. That’s the best way to play it anyway :D
I played it, and the game design is really cool. It's like a retro portable console, I like it. But for me controls is little uncomfortable. I click on the arrow(I mean virtual arrows, on the console), but it's registering as I clicking two buttons and charecter goes obliquely. I'm not sure if I explained it clearly.