Any good browser should work, I've not tested it in much though (Chrome on Ubuntu).
Theoretically it would work on iPad if I added touch controls, that may yet happen in the future. Controls are purely by dragging the mouse now.
Total time developing: 16 hours (including about 10 of those on the libraries themselves which are on Github for public use and my own use during the weekend).
Comments2
I'll bear that feedback in mind when working on #ld48 thanks :-)