This has an easy to understand premise which has a natural fit to the theme. Initially, I ran into performance issues with Chrome but switching browser seemed to fix those (that might just be a 'me' thing)
I found it difficult trying to get through doorways as the character would 'stick' to the doors and slowly push through rather than just move through, and I feel it could do with some extra feedback to know where the guards are/when they've spotted you, since I kept getting jumpscared by them catching me.
Overall, a solid foundation for a fun stealth game. Good work!