The art is cute!
I think this would've been better as a high-score based game. Setting an explicit goal, especially so high up, only highlights how frustrating the gameplay is.
It's a bunch of little things. Not being able to move left/right for a moment after bouncing / jumping is annoying. The hitboxes on the bats are too large. The balloons were unhelpful and dangerous to use. The strange sideways strafe-jump. Just, so many little things that would be fine as a half-a-minute sampler, but are absolutely draining as a three-minute challenge.
There's a strange black flicker effect every time the level resets, after the fade in.
The audio is a tad loud. It was consistently peaking above 0.0 dB.
The donuts were cool!
All-in-all, good work. Congratulations on the submission!