Small and quick game. Actually it feels more like designed experience.. There are sometimes these games that provoke thinking and the gameplay is kind of secondary.
Very original touch to the theme. Anxiety keeps overpowering the player making the world smaller. Ambient sounds add to the dramatic atmosphere nicely. Very moody game. There could be even more sounds coming from the environment to intensify the experience.
Love the footsteps the character leaves behind. I think more games should do this kind of tracking. Zombie eyes glowing in the dark is a nice touch too. I think the bubble that keeps shrinking should be more pixelated to fit in with overall pixel art aesthetics.
Good start for your game designing. Hope to see you in the LD Jam also! :)