You can play the emulator online here.
Recent changes include:
- Sound support (still a bit buggy)
- Ability to run local ROM files by dragging and dropping them on the Vectrex
- Added several homebrew games ("Birds of Prey", "Patriots III", and "Asteroid Cowboy")
- Additional box art and overlays
- Updated 3rd party libraries (jQuery)
For status updates, known issues, or to provide feedback please visit the JSVecX forum thread.