1) I just tested the mouse wheel in this version, and it works fine on my end throughout the game.Rolling back the mouse wheel doesn't work, as it normally does in Renpy games. As to the other, it was like 6 tries before I was able to save before the sudden endscreen (which couldn't be rolled back.)
Is anyone else experiencing this issue?
2) The only time scrolling doesn't work is when it returns to the main screen — at that point, you're technically "outside" the game. But that's normal Ren'Py behavior.
3) If you ended up with 6 tries, it's likely because you held down Ctrl and skipped through too quickly.
It happens to me in a lot of games too, and I know it can be annoying — but as I mentioned, it's already fixed in the next version.