I see you are a fellow rambler like me :D *high five* I adore how much thought you put into your game concept and even the cute animations in the videos :3 I wish I had the time to have done the same, but then I probably would have ended up rambling about everything even more than you did because once I get started talking about this sort of thing, I can’t stop xD I enjoyed reading all of your in-depth explanations about your process though!
The whole OST is catchy & cute, but I especially like ‘So you’ve been turned into a bubble’ because I can really feel your ideas of Queen Bubblene being a mischievous and crooked character, haha. As you say, it does sound royal and naughty!
I do also really like 'Taking in some air' as well though! It is so perfect for a pause menu and a nice change of pace from the other tracks :3