good job putting something out there, sucks to see that your keyboard failed you.
I think your input could use some work, it seems like if i start moving diagonally, i cant stop unless i stop moving.
I would take a look at Input.get_vector: https://docs.godotengine.org/en/stable/classes/class_input.html#class-input-meth...
also, the level is really dark and its hard to see whats near me. I can see you're using a light2d to have a visibility effect. I think you should tweak that so you can see the parts near you brightly, but the parts far away are still dark.
Oh also, you only have a windows build. I am using linux, so I had to play your game using wine. Most of the time, this works fine, but sometimes, it can cause inconsistencies and visual bugs. Since this is a pretty lightweight 2d game, i would recommend a web build as well.