Fun game! I like the art, very cute, the gradient on the background is nice for adding some depth too, I hadn't thought of that.
A few points for improvement: The colliders on the spikes could be a bit more precise, I often collided with a box collider that didn't adhere to the shape of the spike. Some SFX/Music would be nice. Some variety to the spike spawns to mix up the challenge. Some animation for the blob friend's movement. And perhaps varying jump height if it fits with what you'd want for the game.
Overall, nicely done!