Bloody brilliant game lads!
In all seriousness, this is really enjoyable! The two types of scores (crumbs and GBP) confused me at first, but then I thought being able to build up two different scores is quite unique and yet doesn't feel overwhelming. The pixel art is beautiful. The taxi and the double-decker, the different biscuit types, and the background sounds (and music!) are fantastic touches.
To improve upon this, I would animate the wheels on the vehicles so they do not appear to glide, and I would be careful of the national anthem - it loops frequently and loses its charm relatively quickly.
However, you've done a fantastic job! All of you should be proud. I imagine this will rate highly!