I think Wolf Jumping is a wonderful rendition of the endless runner genre! The music is a nice touch, making it more lively and energetic to play. The controls are very simple, but letting you click to swing your sword is nice, not a lot of endless runners give you a way to defend yourself! I also enjoy the difficulty spike, you can feel as it gradually gets faster, which is exciting. Furthermore, the sprite work is amazing!
I will say however, that some things need a little tweaking. For instance, I think a music slider would be much appreciated, it definitely took me by surprise when first playing due to how loud it was. I would also say that the moving background, while cool, can be a bit distracting. However this is less about the background and more about the fact the ground and player are so small at the bottom of the screen. Perhaps changing the game's size or aspect ratio could help? Making the player and ground bigger could help not make the background so distracting, as I found myself sometimes looking at it instead of my character.
Overall, I really enjoyed playing! I’m excited to see what else you come up with.