Yea, making it skippable makes sense.
Hope you figure out what it was :)
As for FPS mouse lock - I tried playing "Yawara", and "Sorcerayser", and the mouse kept running out of the screen. So you couldn't really control the character.
Now re-looking at it... Sorcerayser doesn't seem to lock the mouse at all.
Yawara has like a 50% chance, and if you unlock it, there's no way to re-lock.
In "Erase Me" though, you both have a limited range of movement (helps if mouse unlocks) AND you re-lock the mouse if you enter the computer, and back out.
So the controls end up feeling much better overall.