A free room of magnetic tiles

No account, no install. Drag tiles from the tray, bring one near another and the faded ghosts show every place it could land; move toward the one you want and it clicks in, just like the real thing. Grab a build and the whole thing comes along; flick fast to snap a piece off. Build something, press share, and the whole room travels as one link. When you want something to build toward, browse the build ideas.