Hey there, before going ahead with your map submission review I'd like to inform you that I'm only giving you my personal opinion/feedback on your parkour map submission and my personal feedback will certainly not affect your parkour map submission in the slightest, I recommend that you take in my feedback to improve your submission if there are any flaws, you don't need to and you're free to ignore me but anyhow, before going ahead I'd like to mention that I'm a Moderator not a Map Judge so this is just my personal opinion and I am not accepting or denying your parkour map as this is only my personal opinion.
Originality/design ~ Sadly there already is a Gameboy map called gameboy so unfortunately, your map submission is sadly not an original design. Sadly your build is quite simple and honest I believe that if you gave it some more time you could have made it look better, at the moment the design is quite bland and it seems you didn't put much work into it.
Parkour variety/difficulty ~ You've added some variety which is cool but for some reason, your parkour still seems a bit bland, it's most likely the fact that when you added the variety it's in sections more than in natural locations so it doesn't feel natural, not really sure how to explain it. The difficulty was in my opinion not really considered a medium map and from my experience would most likely be a medium map.
Good luck! :)