***SPOILERS*** (I guess)
Hi Sasha! I didn't realize you were the artist when I posted, otherwise I would have used another tone... sorry!
About the screenshots, I didn't pay too much attention to the itch.io page of the game before playing, as I usually do it after I'm over with the game! I was referring to the normal form, so technically you are not spoiling anything... I just meant that based on my personal experience I wasn't expecting such a well executed (and I must say original look) for an overused concept as an angel, so I was pleasantly surprised when I saw it all at once. I just imagine that other players may enjoy it too the way I did, so you could consider to design the early phases to make this more likely? Perhaps I was just a lucky exception so don't mind me too much!
About the art, again sorry! I meant that they show signs of inexperience. There are cases when it's clear they are hasty. It's unfair to point that out on a game made for a jam, I know, but when you see Kisabel (good) and the Seer (bad) in the same screen it's almost disbelief breaking! I can't tell you in the specific "what is wrong" and "how to improve it" as I'm not a skilled artist... maybe I only have this: is it possible that the sprite of the seer is taken from a drawing on paper that is too little?
About the smiling face of Letti... yes, that smile grows contageous but maybe it's those big eyes that make it creepy? Or maybe are the separations between teeth...? Or the combination of both?
Hope I helped your professional growth with my rudeness, i'm looking forward to see more from you :)