Build. Play. Test.
A mobile-web building sandbox — playable now in your browser. No download. No setup.
Play Now — Alpha Demos
All demos run directly in your browser. No downloads required.
Build on a Platform
Master the basics of building and stacking
Collaborative Building
Build together in real-time
FPS Destroy
First-person destruction physics
Jet Destroy
Aerial destruction with physics
Marble Ball
Physics-based marble rolling
What ships today
Everything below is live in the alpha. Click any card to try it in your browser.
Physics Sandbox
Blocks fall, marbles roll, safe destruction tests; mechanisms in progress.
Try physics demo
Zero-Install Play
Play instantly in your browser—no download or setup.
Open in browser
Mobile-Ready Experience
Build, play, and collaborate on any device—touch-optimized for phones and tablets.
Try on mobile
Real-Time Collaboration
Build together with a friend in real-time. Two-player co-building works now — larger groups coming next.
Try collaborative demoWho It's For
Players
Jump in, build fast, break stuff safely
No install, no downloads. Click and start building in seconds. Experiment freely in a safe, collaborative environment.
Creators
Build, share, and get credit for your work
Publish your builds for others to explore and remix. Two-player co-building works now — attribution and version history are coming next.
Educators & Facilitators
Safe by default. Collaborative. Session-friendly
Perfect for classrooms and workshops. Built-in permissions, version control, and real-time collaboration without complex setup.
Coming next
What we're building after the current alpha. Vote and follow progress on the roadmap.
