The animation and movement I think are very well done, I've played several jam platformers that were not as smooth looking as this. But I do also have several issues with it.
The screen size requirement is a bit of a problem, I have a 1080p monitor so it wasn't an issue for me but unfortunately 1920x1080 isn't standard for a lot of people. I'd suggest looking into using the canvas scaler component and setting the anchor positions and pivot points of UI objects. It's definitely a bit of a learning curve at first but I think it pays dividends in terms of user experience. I know from experience because one of my friends was unable to play one of my games a few months ago because he had a 3:2 screen laptop and the UI went off the screen.
The text in the main menu is kinda hard to read against the background, I would suggest perhaps using TextMeshPro to add an outline around the text. Or perhaps making the text a colour that contrasts nice with the background.
Gameplay wise I only really got stuck at one point in the third level where the gaps between platforms were too narrow and too low to get any height and I kept falling to my death.
Overall though not a bad platformer, nice work!