No worries. Not that big of a deal after you realize what's happening. It's reversible by scrolling too (up to the point you'd already played, I believe. You've inspired me to give Ren'py a go!
Viewing post in The Sword's Purpose (PirateJam16) jam comments
Go for it! From these two weeks I found it to be a VERY FLEXIBLE engine for visual novels! If you want it there is probably a way of doing it.
I'll say that somethings require some research because they might not be super straight forward thou, and personally I prefer the narrative writing of Ink (An interactive story scripting language) than Ren'py's. But they're docs are good enough, that's were I learned basically everything for this project.
Id say go for it! Learning something new is always fun!