I'm not a judge, this is just a mapmaker's opinion
Theme 2/5; While there may not be specifically any ore themed maps, there's plenty of minecraft and mining related maps, (which center around ores) such as but not limited to: GoldMine, Mineshaft, GreatCavern, SaltMines, MinecartRider, Mine (Donator), UnusualCave, LavaCavern, AbandonedCave, GoldMinePK, Cave Jumper, Threading the needle, Mineshaft (The Falling Maps, Mineshaft (Biomes Dropper)
Build 1/5; There is no central build to this map. There's four walls and a bunch of floating blocks. I'm guessing you got inspiration from some of the old maps, which are very bad examples of maps. Look at /warp beta to see what kind of maps get accepted nowadays. Further reason for a classic maps update.
Parkour 2/5; The parkour is sort of built into the build, though most of it is floating blocks. Also you only used ladders and solid blocks. Try using soul sand, trapdoors, enchantment tables, anvils, slabs, daylight censors, vines, brewing stands, carpet, heads, cobblestone walls, fences, glass panes, etc.
I'm sorry this review was harsh, but I personally doubt this map will get accepted in its current form. Good luck with your future maps!