I actually really liked this!
I am going to presume you did all the music and SFX for this game. The music was very well written and mixed! But it felt too busy for a sudoku game; I found myself too distracted by the music to focus on the numbers sometimes! There was a section in the middle that was more subdued; I wish that could have been the music the whole time.
The squeaky sound effect of the witch is too loud; I don't mind it, but it hurt my ears in my headphones. Art is adorkable. Puzzles are good, ended up doing one of the easy ones.