Nice idea for GMTK. I liked the fact that you don't simply loose at the end of the countdown, but it only makes your task significantly harder, so you still have a few seconds to rush the last enemies and escape.
I know you don't want feedback on art, but I still wanted to share some easy points to improve : replace the default font and replace the native button, even if it's only a 2 minutes sprite but that fits better in your game.
A thing I liked is that even if the gameplay is simple and easy to understand, the skill ceiling is improved by many mechanics : good acceleration and decceleration curve, with the right positioning you can hit 2 enemies with one attack, and the punishement if you try to time the attack perfectly.
The HP bar felt kind of unfair because it was still displayed like 10% of it but I still died.
Most important are the items. First of all, I didn't know I could only choose 1 of them not take all 3. But it's also hard to understand what are their effect. I understood the heart gave HP, the circles gave damage, and the milk (i think) gave speed ; but only after carefully experiencing. I think you should make the icons more self explanatory, or add a title / description to each of them.
I think you should add some way to see how much have you damaged an enemy, either by adding an HP bar for them, or a color change. For balancing, I think it became hard kinda fast, I think the difficulty curve should be smoother.
I had fun playing this, good work !
EDIT : I enjoyed the music, but I wish the better part of it came earlier, because the beginning is by far not as good that later in the track.