Excellent job for your first jam! The core mechanic is awesome and the simple graphics have a charm to them (I particularly liked how the eyes moved as the enemies turned). As mentioned on stream I think there are some simple things you can do to really polish it into something great:
- I think the grapple rope moved to slowly and it made the gameplay frustrating sometimes, it should definitely be sped up
- Adding an emissive/glowing effect to all the elements (except maybe the grey walls) would be a nice touch I think
- Adding some simple audio will also really bring the game to life
- Perhaps being able to sneak up on enemies who have their back turned could be a nice feature too, but may be a little complex