This screenshot is a mockup, editor still a prototype.
A room based map editor for use in PlayStation (PSX/PSone) homebrew games made with JavaScript.
The maps generated by this editor are separated into individual rooms, with set transition points that will switch the rendered area, allowing larger playable maps in your games.
For now, we're starting the development of the editor, with the code to render and manage levels to be developed at a later date when the editor is at least minimally functional.