Cat climbing doorframe

My 1 year old loves to attempt to climb my bedroom door frame. Just my bedroom one? i thought it was the wood at the old house but have moved and having issues with a metal one.

I have heaps of toys and scratching ( 4 story and smaller) posts around the house dont know why he dose this?
Help?

Is he oriental or siamese, per chance?  They live for climbing door frames and other elevated places, where they can teeter dangerously and play with passers by.  Even if he's not, some cats just like hanging about on top of doors for the sheer fun of it.  I very much doubt there's anything that can be done to alter this behaviour if he already has a tree to climb.  He's not hurting anyone.  Unless, of course, he takes to making flying leaps onto your back and shoulders, ouch! 

Hes a tabby and he dosent go on the doors just jumping and sliding down the door frame on the wall.

He has lefts scratch marks on metal door frame and the wall ( i live in a rental)

He looks as though he might be a right, mischievous, handful by the look on his cheeky, wee face 

He'll calm down a lot now that he's passed the one year mark.  Is he neutered, by the way?

All I can suggest is:

That you rub lemon, citrus, or citronella onto where he scratches, as cats don't like the smell.  You can buy ready made "cat-repellent" sprays, or use essential oil, or even an actual lemon, if needs must.  Also, and this sounds pretty mean, but cats don't like chilli pepper or very hot spices, so you could try booby-trapping the walls by rubbing some on; he'd soon think twice about putting his paws there  

Try putting tape, either strong duct tape, or double-sided sticky tape, over his scratching areas.  He won't like the texture, so should be deterred.  

Grow some avena sativa, or common wild oat, which is yummy, calming cat grass for him to munch on and put it in an area away from the scratches, so that his attention is turned elsewhere.  You could also try a Feliway diffuser plug, which gives out cat de-stressing pheromones and is useful for cats who scratch furniture. 

Does he do it when you're around or when he's on his own?  It might be attention seeking behaviour, if he only does it when you're around.  In which case, it's best to not encourage him by telling him off, as that will only reinforce the notion that by scratching he can gain your attention.  Instead, get out a wand game and play with him in another part of the building.  

If worst comes to worst, squirt him with water from a plant sprayer or water pistol    

Mainly at night when me and the partner are in bed. He has hismoments when he is a handful but he was worse before he got desexed at 6months

He gets plenty of playtomw woth us as he is spoilt with affection.
Its mainly after he has had enough play with us and becomes bitty and wants to run away so we let him and 10mins later hes at the door frame

Unfortantly water dosent work he loves the stuff comes in the shower a d tips over his bowl jusy so he van play with it.... he is just a reallyq strange furr baby

He might be jealous.  Try the citrus/chilli/tape deterrents.  And try not to pay any attention to him.  I know this will be ever so difficult but he'll eventually realise that you're no fun when you're in bed, so there's no point in hassling.

Try giving him a big meal just before you go to bed, as he should then feel the need to sleep it off instead of getting up to mischief.