Thanks to UMTerry's stream (which was incredibly enjoyable), I found quite a few bugs still.
While a bit embarassing, it was incredibly helpful (and at times funny).
In this newest version, Lullaby v 1.2, all of those are fixed. Thank you, Terry!
It was such an amazing experience, seeing my game being played (and being enjoyed too!), I am so happy that I got to experience it.
And I am looking forward to (hopefully) experiencing it again.
As always, thank you for your support and your patience.
This has been a learning experience and so important for any future games I might make.
(Edit 22/05/2021: Fixed another gamebreaking bug someone pointed out, but decided to let it remain as Lullaby v 1.2 - the change was minimal so it didn't seem worth it to rename it.)