Just see the message in the image below:

@Aakash-Panchal27 hello! Thanks for reporting it. Our new playground should be in this new URL: https://v-wasm.now.sh/
@medvednikov The playground page is still accessible. Can we redirect it to the new one?
This should perhaps not be closed until it is actually resolved!
Right now this main example -- https://vlang.io/play -- linked from the language homepage -- https://vlang.io/ -- is still broken. Is there a separate website repository where it should be reported?
You may need to refresh your browser. The only link to a playground on the homepage is at the top, and is named "Wasm Playground", which takes you to the new (fully functional) one. It doesn't have all the examples from the old one, yet, but they will be added.
Steps to reproduce:

click "Run" on the big hero box in the middle of the page.
Hit Run on https://vlang.io/play
"You just found a bug. V can't compile this program, but it should. Please create a GitHub issue."
Ah, thank you. This is a different spot, and it needs to be fixed to point to the new playground instead of the old one.
I've added a redirect.
Most helpful comment
@Aakash-Panchal27 hello! Thanks for reporting it. Our new playground should be in this new URL: https://v-wasm.now.sh/
@medvednikov The playground page is still accessible. Can we redirect it to the new one?