Honestly this is the best game i've played in this jam so far. The UI is clear and pretty, the music is really cool, the graphics are clean and fitting, and the concept is both creative and well executed.
I guess you didn't really have time for that, but a way to select levels would have been nice, especially since escape sends the player back at the main menu without a warning. Also, people are complaining about difficulty for the last levels, but i would argue the levels are fine, it's the margin of error which is too slim : it doesn't feel right to die because the very tip of my hat touched the wall, sometimes by just a pixel.
The timer is a good idea, it's always cool to promote speedrunning, and the audio settings are always nice too in a jam game. I think you could turn this into a full game if you find a couple of interesting mechanics to mix with what you already have, maybe some side-scrolling levels, or at least bigger ones, could be a good idea for exemple.
I enjoyed the tension each time i blinked, and redoing the early levels in one go after getting used to the game was really satisfying (that's where the side-scrolling levels idea comes from). Congrats!