Hey Aza, i'm new to your games and I loved the look of this but unfortunetly I couldn't progress mcuh due to two doors not letting me open them, I have your other games will be getting around to them very soon. I liked this but would love it more if I got to progress. If you fix it, let me know and I will come back to finish it.
Hello thanks for playing you are missing the keys that is why you can't open those doors. At 11:16 in your video there is a key right in front of you on a skeleton, this key unlocks another section with a puzzle / cave, the key for the room behind the purple room you will only get later on.
You need to press CTRL to crouch and pick up the key at the skeleton first to progress. Keys have a glowing blink effect but perhaps you didn't notice it, as for the doors they are physics based so you got to hold E and drag at the same time. Hope it helps and thanks for playing and checking out my games! P.S if you still are stuck there are other videos of full playthroughs below here.