Fun pixel art and game mechanics. :)
The strategy on when to use each weapon was great.
Each object's readability was a bit difficult. I exploded myself with the explosion thinking it was a crate and wasted all my bullets on the mushroom thinking it was an enemy.
In my last play through I died as soon as the room was revealed and felt a bit cheated. I would avoid having enemies spawn or more right at the door until the player has passed that point.