Presentation is 10/5. I absolutely love the Gameboy Color graphical style, replete with endless loving flourishes in the opening screen, the background, the margins, etc. The music and SFX are also very good.
The challenges to navigate are clever, but, I think, somewhat too hard. I got to the roof, but gave up after trying it about 20 times. The most disappointing part was that I had 4 hearts, but of course almost all the hazards are insta-kills (the turning gears, the boss's beam weapon).
When calibrating difficulty in a game jam, it's best to err on the side of leniency, so your peers will have an opportunity to experience your creation without dealing with excessive frustration. I myself have a hard time following this advice, but I think it's the right approach nonetheless. :D