Hey blue o/
As promised here's what I think after testing your map. Again, sorry for not telling you this right away. Regarding the build, it's ok. You definitely could have detailed it a little better both outside and inside but the most important thing for me at least is that I can tell what it is (in this case a bus). Right now it just seems like a bunch of squares making a bigger picture together. As for the parkour, I am pretty sure it doesn't match the hard difficulty. This is, in my opinion, expert material with some jumps reaching the insane difficulty. (Those 2 trapdoors I told you about). Furthermore, it felt like at times it was getting too annoying to do the parkour. There were a few jumps here and there (like that fence jump I showed you) that were frustrating to do. I suggest nerfing some of them to make the parkour more enjoyable. Another great way to make a parkour map more fun is by adding slime jumps. I believe I only saw one or two slime jumps. Add some more! Other than that the variety was also ok, the only time it felt a bit repetitive was when I was parkouring around the seats and that's because the only way to get past them was either by the side or by jumping on that greyish clay in between the yellow parts. Nonetheless, very nice effort! Good job :)
Note that the map judge might not have the same opinion as me so make sure you get more feedback
Good luck :D