Thanks for playing! Which browser and OS were you using, so I can try to reproduce the focus issue?
Well, I just tried it again and didn't have the same problem. Maybe I goofed up? I was on Windows 10 using Firefox when it was giving me a hard time, but it seems fixed now :P Also worked on Chrome when I tried that. Like I say, it's pretty cool that you made this! Procedural stuff still makes me shake in my boots, so really cool job using it!