The idea is great and visually the game is already really nice! I also have to agree with what others have said, the collisions are sometimes off, making it difficult to really estimate the walkable paths. Also the dialogue on the fuse doesn't seem to be working properly, for me it always went back to saying that the fuses are blown and when I walked up to the door it suddenly let me in.
And maybe some visual hints that give an idea where to look for items would help give it a bit more direction, I was walking aimlessly until I found just one fuse and then basically accidently stumbled into four. With keys it was similar. I really liked the dialogue boxes popping up to give some atmosphere/storytelling, but maybe it would be better to have them only appear the first time you walk through an area, when it appears multiple times it slows down the game.
But overall I can really see the vision and I'm excited to see where you take this! The monster chase sequence sounds great and I really like the vibe of the game already! A solid proof of concept for a horror visual novel on the gameboy!