The Scratch team hasn't officially released NetScratch yet, so the blocks don't communicate with the server (work).
(There isn't one!)
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There would be a huge problem with netscratch (Though I really really want it to be made!). The problem is if you have only one or even just a few servers for netscratch, it would be pretty useless because there will eventually be like hundred-thousands of netscratch games, so it would lag so much.
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