Looks like the controls needed a bit more time in the oven, Jumping felt kind of floaty and at points I would pause in mid air?
Double Jump Mechanic was neat, but needed more visual clarity to when you can Double jump. You really did have to 'feel the impulse'.
I know the limitation was Blood is lethal, but I feel like the implementation was a bit "Oh yeah, blood rises and it kills you" And that's... It for the blood, you then have spikes and swords to avoid.
Graphically, I think the 3d sprites with the pure 2d sprites kind of clash. If you want 3d rendered sprites, go with that. If you want 2d pixel sprites, go with that.
Anyway you get half a cookie! Keep it up!