Interesting game, the controls are good and the design is pretty cool as well.
However there's a few things I would change.
1. The music is repetitive and can doesn't add much mood. try to change it up from when you were seen and when your are sneaking.
2. There are no models. Fine for an early access game, but if you want to make this a full release, you need some characters.
3. Just sound effects in general.
4. Throwing the object felt weird since I had a hard time figuring out where I'm going to throw it. Maybe use the mouse as the controller and throw and object where ever the mouse is.
In the end, its a very nice game with good potential. However, it needs some polishing.
(Warning: I'm a beginner developer too so you don't have to listen to all my advice.)