The working demo I have right now is all touch based, which works well with mouse. In fact the biggest issue would be fullscreen, or windowed for multiple platforms.
The other issues I have now are game specific, such as artwork,(using plain cubes, or finding decent free art, such as the assets from Flare) that includes animations for multiple angles, and just how many angles are needed. A great many games use at least 16 different angles, which would be a stretch if you want multiple characters, and low download size, etc.
And then there's actual gameplay. If its Diablo-esk will it use collisions, or a percent to hit ratio, or should that even be included?
As far as sharing the capx,...yeah that's a bit iffy. I would have no way to make sure that nobody passed it around. It could either be the good Samaritan system, or perhaps a Kickstarter could be done, where if the target is reached, I release the capx to all for free, and if said target goes beyond what is set, I could add extra game elements.