how

Try checking out @griffpatch on youtube. He has a 4 video series on how to make online multiplayer games. I used this series: https://www.youtube.com/watch?v=1JTgg4WVAX8&list=PLy4zsTUHwGJIw6-ra80IMuxiRW4XHiGqf
to make my game: https://scratch.mit.edu/projects/996466268/


Go to griffpatch's channel via the link and then go to playlists. Theres a 4 video playlist on multiplayer games

If you want to make a local multiplayer though, you would have to assign different keys to different players (player 1 can control arrow keys, player 2 can use wasd).

It ultimately depends on what kind of game it is.

If you do make a multiplayer game, when sending data, I wouldn't recommend representing negative numbers with a 0 at the start. If the only possible negative numbers are positions, I think it would be easier just to add 240 to x, 180 to y, send that, and that when you decode it subtract 240 and subtract 180. This has the chance to take up less characters, and is probably faster.

thx