Thanks for the long write-up, so I'll give you a few responses.
1. The final ending you're missing is in the hub room as you suspected. Really take in the environment. Really.
2. I knew going in that mouse controls would be difficult with the more precise stages, but there's not much I can do about that, figured no one would really try it.
3. The problem with defaulting to "Auto Dash" is that there's no way to set that, so the only way to set that is to export the game, open it, change the setting, and upload it with the config save file. I had done that, and then forgot to do it with this version.
4. As for the name, Windows has a hard character limit on how long file path names can be (i.e. the name of every folder that the game is a subfolder to), so using the full title would needlessly use up a lot of that limit and limit where it can be installed on the user's drive. Calling it "Forward Punch" instead of simply abbreviating the real title is because it has 6 Ps, and a 6P is Guilty Gear shorthand for punching while holding forward.