This reminded me of the Doctor Eggman fights from the Sonic series 😄It took me a few rounds to realize I could double jump, which made movement a lot easier. Some of my better runs were ended when I jumped over the earth, and got bopped by a spike that has just spawned on the screen. I like how the earth's attacks have been telegraphed, and there's learn/react rhythm you get through trial and error.
I had a lot of fun playing this, love the 3D aesthetic as a side scroller.