If I were to offer some feedback, the English on the homepage needs some tightening up. There's some bad grammar in there. That would definitely make it look a bit more professional :-)
It would be awesome if you can help. Do you use telegram? @ ruslan_ianberdin
Not OP, but here's a couple of quick fixes for you (honestly, your English is pretty good):
"Play with any of 2 millions of NPM packages ..."
-> "Play with any of 2 million NPM packages ..."
"PlayCode is fastest coding experience ever."
-> "PlayCode is the fastest coding experience ever."
"It helps to avoid looking for a documentation ..."
-> "It helps avoid looking for documentation ..."
Thank you for your time.
Also note, the section "Bug Finder" on the landingpage just contains the text of the "Emmet" section above it.