You've made a neat little remake here! The concept of FNAF on the gameboy is for sure a creative one. The games visuals are pretty good, and everything is quite faithful to the original.
Whenever I first entered the game I was confused what I was looking at for a good couple seconds - then I realised it was the office from the top down. Nothing really looked distinct enough for me to instantly make that connection - but I think the rooms on the cameras look great! Since you say you wanna continue this project I'd definitely suggest rendering the office from a first person perspective as well.
The sprites for the animatronics look great and are wonderfully crafted for an asethetic that only allows for different shades of green - so well done with that! The lack of audio was kind of a bummer though since audio is usually the most important part of a horror game so I'd always recommend making it a priority! Though in Jams I'm definitely guilty of neglecting audio til the end too lol.
Great job with this entry! I hope my feedback allows you to make this even better in the coming weeks :)