At first: Your game is the best in the genre I played so far! Seriously. It is really cute and adorable. I am looking really very very much for the release!
When I played the demo I decided to buy all the DLCs.... but... and please do not be angry it is just my personal opinion, 4,- USD for a DLC is way too pricey in my eyes. I am absolutely willing to pay a price for the full game, when it is released (even it is free), but the DLC could be a bit cheaper.
Maybe you could (or want) to consider to make the DLCs cheaper, if you by 3 or 5 at once. Like a bundle. I would love that! Still, your game is gorgeous and I am crazy about it.
I hope you are not angry. Please feel free to delete this comment, if you think it is inappropriate. It is just my very personal very private opinion.