Not yet; Rifle Warrior is still in development. I do have plans for a public beta in the future, however!
They are already dedicated to the public domain and available for public use. Keep in mind that their designs are not final, as Rifle Warrior is still in production.
On itch.io, IndieDB, OpenGameArt, and Freesound.
Given that it is generally my first major project that uses the Love2D framework, I wanted to keep the scope of Rifle Warrior and its engine more modest. I do have plans to eventually remake Rifle Warrior in a more capable engine, possibly as a hybrid squeal.
Probably, but I already have a plan for my next video game.
Scratch 3.0 (with Scratch Addons, Inkscape, and paint.net) was only used to illustrate vector graphics. Rifle Warrior uses the Love2D framework instead.
itch.io currently does not list BSD 2-Clause + Patents as a selectable license.