Animation style is awesome, you know your squash and stretch! I was also a fan of the music, the first one feeling pretty tense as you enter the unknown and the second one very triumphant as you get a new ability and are able to reach many new places. I would recommend leaning into the polish a bit more. Some enemy attacks are unclear or really hard to dodge, especially plant bulbs when sent by plants offscreen. I think some of the pixel sizes were different which can make an uncanny feeling. The gun didn't always shoot at the right angle and I think with the backpack sometimes you can jump more times than it makes sense. But other than that I love the ideas in here they're very creative!