Thanks for the feedback and suggestions everyone. It is true the if this is to be further developed it would need puzzle mechanics that work around size changing, but I would not make it a fail state mechanic. I see a lot of nsfw games that have their "titillating content" as fail states and I don't think that is good design, it almost punishes people for playing the game well. There is a lot to improve with this little thing I made but I did, by desing, made the character shrink and Sylvia grows for each piece of the puzzle you solved because I thought that would be a good reward for the crowd I made the game for.
Seems a lot of people dont like Sylvia. She is supposed to be cocky and condescending and that is probably a turn of for some, personally it's not my thing either, but I feel that the main problem is that she is giving too much exposition. She ended up in the role of puzzle aid and little lore dump. I think that ended up been too much.
Anyways that is what was in my mind after reading you guys feedback.