Thanks GearBunnyStudios. 10-15 minute install is definitely not normal and caused by your computer being below specs. The initial load should be about 30 seconds on recommended specs and no more than a minute or two on minimum recommended specs and should not be any slower than subsequent loads. I've also noted your suggestions and will continue to work out how the first stages of the game unfolds pertaining to learning how to play. My initial plan was to have Windstone start the player with no help at all, completely blind just as The Long Dark as part of the experience, but there are already some tutorial objectives integrated.
The hold-to-attack will have an option to toggle click-to-attack. Some weapons may always require holding to attack such as drawing back the bow.
Thanks again for your input.