Nice chiptune. I'm sure you had fun working around the NES' limitations. I'm not sure what to think about the more dissonant tracks like Lorsque la Nuit Tombera, but I generally had a good time. If you plan doing more chiptune in the future, I recommend looking at adding vibrato on long held notes, it can really make them pop, as well as pitch bending notes up and down to emulate regular instruments like violins. Still, a lot of the songs feel pretty "full", if that makes sense, it can be hard to do that, so good job. I'm a big fan of the NES and the C64 chip myself (Megaman 3's soundtrack is absolutely phenomenal, check out the title theme if you haven't already).
My favourite track was probably Kesäsota, it's simple but it works really well, I loved it.
I enjoyed how some of the titles were in french, makes them stand out more than other song titles. I mentioned it on Discord, but I learned french before english so I felt like I understood some kind of secret code lol
Overall, nice job. I'll be sure to check out your other works, I'm curious what your stuff sounds like when you're in your comfort zone haha
Ta musique est phénoménale! Continue sur ce chemin et ne t'arrête pour personne!