I was confused by this too. Clicking and dragging with the mouse (or at least touchpad) works for navigation. The HTML canvas element key events aren't working (maybe they worked . in older browsers). There is an open PR that hooks window events instead (I made similar edits locally that make it work). https://github.com/s-macke/VoxelSpace/pull/13. The distance rendering works once you move and force a redraw.