Senku OS

A fully browser-based WebOS completely inspired by Dr. STONE! draggable windows, a taskbar, a science notebook,(not editable sadly) and a built-in streaming for dr.stone only tho!, all running in plain HTML, CSS and JavaScript. No frameworks were harmed in the making of this.Getting the streaming links to actually work without breaking everything, and configuring the taskbar to behave like a real OS taskbar was a real pain.. The streaming feature, hands down is my proudest part. The fact that you can browse Dr. STONE episodes and watch them inside a fake desktop OS running in a browser tab is genuinely unhinged and I love it.
Just visit the site no tutorial needed. If you can open a browser tab you're already qualified. Click around, open some windows, watch some Dr. STONE. It's that simple.