I really liked your game mechanic, I thought it was very creative. Your art was amazing for being one-bit. The sound effects were very fitting. The game when I first opened it I thought it was a top-down shooter, but I was happy when I realized it was a platformer. If I am extremely picky your game was not one-bit because of the particles the arrow left when it hit something. The games tutorial text was very hard to read (For me). Overall strong entry, good job, and keep it up! Here is a screenshot of what I mean by not one-bit and the tutorial hard to read: 
EDIT: I do not think those black particles are due to dithering.