This is absolutely perfect for a NES jam game! I loved the sprite work and overall aesthetic, the simple two frame animations work really well and the sound effects and music are great.
I really enjoyed the yo-yo/platforming mechanics and how natural it feels to sling yourself around the level, and I remember you having a similar mechanic in Frimble last year which also felt just as good and equally as polished as this.
Love the horror theme too.
Great job, and thanks for hosting such an awesome game jam!