First off, HUGE THANKS for this awesome game! It's literally the best I've played in years. Mrs. Slithers TOTALLY ROCKS now, can't wait to see what happens with the plot in the next releases!
Sadly, since 0.0.6 I'm not visited by vampire bat anymore, probably the bug was there before, but right after I've downloaded 0.0.6 I've started to mess around abandoned house to abuse another vampire bat bug which temporarily blocks its script if you descend to the basement and prevents it from sucking your juice, but this time when I've got to the Creator, killed him and returned to the fortress via juice portal, I'm not visited by vampire bat anymore, no matter how many juice I have. But I get sucking skill anyway if I'm killed and continue from any checkpoint.
Btw, it will be also cool if vampire bat makes comeback too at some point ^^
Thanks again and good luck with further development!