Great job on your first GameJam! It's a shame there's no humour category (that's ludum dare) because this would've scored pretty high on that!
My suggestion for the level design is that when you're introducing a new mechanic (like the hamburger) do it near the start of the level, not right at the end, because otherwise it makes it quite frustrating to lose due to something you didn't know was even a feature. Perhaps have a level where picking up a hamburger is required before having one where it needs to be avoided. There were also a few pits you could fall in, and once you were there, you couldn't recover, but the level still went on for a while, and that felt a bit frustrating
Other than that, making the camera jump around less, there were points where I couldn't see what was below me and just had to do a leap of faith, I would've liked it if I could've seen where I was jumping.