Shadow Creature or Demon opinions needed! Help please

Hi my name is Brett, my partner and I live in Australia and I have to ask the opinion of my fellow GLP members.
My whole life I’ve been fairly well versed in the paranormal but I have recently experienced an encounter I find hard to explain or categorize, a few weeks ago while my best friend was visiting from interstate he, my partner and I would go to the local sports oval at night to watch the stars, just a minute or two walk from our home.

On our first night out we happened to see a couple of small UFO’s in the sky but more interestingly we felt an eerie presence as if we were being watched, we stayed out for about two hours and the three of us started to notice a shadowy figure darting around the trees and shrubs that line the edge of the oval, never passing into any shafts of light. It centred around a cluster of heavily shadowed greenery at the rear of the park and oddly all the three or four local dogs that had been going wild in near bye yards since we noticed the movement fell totally silent all at once.
My friend was terrified and my partner was very sceptical, the shadowy mass seemed to be about the size of a human being, it moved to the play equipment at the end of the park near the local scout hall, I decided to run towards it to gage a reaction and as I reached the edge of the play equipment I felt a deep sense of foreboding and dread and as the others caught up it faded off and the creature had disappeared.

We all brushed this off and considered it paranoia or imagination, for the rest of my friends holiday we went to the park and had no similar experiences. Although after going to the 24 hour Kmart 10 mins walk away late at night my friend and I saw a strange shadowed figure in the concrete car park of the new apartments being built across from my house and a feeling of dread ensued, yet again we brushed it off as imagination.
A couple of weeks ago I was outside in my yard around 1:00 am looking up at the stars and putting my wheelie bins I had forgotten out on the street, looking up at the stars I heard a rustling of shrubs in my neighbours yard, being a widow who admits to never going outside after dark it seemed curious and I was worried an intruder may be in her yard, it got louder and closer to my fence, I felt uneasy and threatened, I tried to think rationally and compose myself but I felt more and more in danger, my yard is a corner block with a broken gate so the back yard has the driveway and garage and a clear view across the street where a construction site currently is as new apartments are being built. Suddenly the cyclone chain link fence of the construction site rattled and banged and a shadowy figure flashed across along it, I felt threatened and like I was being closely watched, I ran inside and locked the doors.

A few weeks have passed since then and admittedly all the previous incidents could have been imaginary, but tonight I have seen something undeniable that has totally rattled me to the core.

Right before bed after a late night my partner and I realised that the Fed Ex delivery man had attempted to deliver a parcel two days in a row and he had left a note saying tomorrow would be his last attempt, having a late start at work we set our alarm early but just in case my partner suggested we tape a quick note to the back door where he had slipped his failure of delivery notices before to say please knock on the front door just in case we over slept the alarm so we would hear him and wake up. I wrote the note, grabbed the tape and headed to the back door, unlocked it and tried to peel some tape off, annoyingly it split and was taking ages for me to find the end in the dim light, I eventually tore a piece off and stuck the top of the note on. Then I heard what I can only describe as foot steps loud and large on my neighbour’s roof again, and a few deep guttural growling noise, then the sound of feet hitting the pavement hard as if someone were sprinting, fearing trouble makers as we sometimes get or criminals, I closed the back door quietly and peeped out the back window, seeing nothing I decided to gather my courage and tape the bottom of the note down, unlocking the door and finishing up, just as I was about to close up I felt the feeling of dread, but more intensely then before it was shockingly overwhelming I felt like I was being watched by a predatory animal, I glanced around the yard and then I saw it, no more then 30 feet away from me, perched on top of the garage roof right on the peak, hunched forward with its arms out wide looking directly at me, I stared at it for a long moment,easily the size of a man, it was pitch black, and clear against the night sky, then it bounded off thumping towards my back neighbour’s house along the garage roof. I slammed the door in sudden panic trying to lock it, my partner came rushing from bed worried by the ruckus and I told her, we stood watching out the back window but nothing was there, we noticed both our cats were going crazy and very alert.

I have no doubt what I saw tonight and am terrified, I have no idea what it is, demon, alien, shadow man? But it has me shaken to my core and afraid to sleep, please GLP help me what do you think it is? If it helps we have a huge amount of UFO’s in this area and we have personally seen loads of small star like moving objects in the Sky, I have no idea if they are related. I am religious and have said many prayers for protection, again any opinions are highly valued, thank you all in advance.