Comment by grey-area
Getting a URI too long error unfortunately - I guess you didn't want to store state in a db but storing a few points shouldn't take much space? The URI is 13k characters long unfortunately for 8 lines (guess you are storing all the state including balls?). Could you perhaps leave out balls to make urls shorter?
For example this quickly grows the url:
https://franzelio.franzai.com/?share=eyJsaW5lcyI6W3sieDEiOjA...
should be fixed, old share URLs sadly will not work anymore, had to develope a much shorter URL encoding for the state
but now i shared a 20 lines, about 40 dots state and it worked