There are so many things to admire, it's hard to know where to start.
First, a map of Europe, then a system of decreasing money according to distance, and a mini-game for when you run out of money...... and so on.
Viewing post in Traveling across Europe (PICO-8) jam comments
This game is based on an unofficial Famicom game developed in 1997 by a Russian developer, Aleksandr Chudov (video). While I made some additions and coded the PICO-8 version, the original concept is completely taken from that game. Most of my time was spent figuring out how to fit all the code, data and graphics below the limits for a PICO-8 cartridge file.