Very fun, especially in the second phase! I think the thing that makes it feel good is lots of destruction, and the tight packing of stuff in the second phase made that particularly prevalent.
Great sound design and music for this; and the controls felt pretty good, specifically on keyboard (the acceleration in movement made me swap back to keyboard after trying out the controller, since it felt kind of laggy?). Jumping was fun, but I was disappointed when I got blocked by invisible walls trying to jump over e.g. a fence just because I wasn't big enough to break it. The pixel art is lovely as always, and I enjoyed the announcer voice lines!
While playing, it did feel like there was a bit of a conflict of goals. The premise appears to be that you're trying to get worms. So, I was mostly going after worms whenever I saw them. (And because they take a bit to spawn after you destroy a thing, it meant backtracking through destroyed areas, which means I'm spending less time doing the fun thing, which is destroying stuff.) So, I grew quickly, and eventually when the game ended, and I enveloped the earth with my mole arms, I got a score for the damage I did. But I could have gotten a higher score if I'd avoided the worms and only collected them after destroying everything I could. I.e. it feels like I'm being incentivised to not do the thing that the game is about -- eating worms. But maybe I'm misunderstanding the core goal?
Anyways, great job! (Also, I liked the little poem at the start of the game description!)