I couldn't make it past the second room - maybe there was supposed to be a cube in there? I could not find it. Sometimes the ultra bright lighting made the cube hard to spot, though - see screenshot.
oh yeah, i never was able to test the browser version since it just kept giving me errors, so I removed it. That version was also using WebGL (which I believe is equivalent to an old version of OpenGL) rather than DirectX on the Windows version, so that probably disabled some features i was using