Hi ranshaa! Thank you for checking out our game. Use Q to mind control the npc outside the door and walk over with him and hit E to open the door. Doors can be opened by E, and if you can't open a door yourself it means there's an NPC nearby you need to take control of by playing your Ukulele.
Oh, i see. i was trying to take control of him (the first NPC you can control) but for some reason the camera doesn't center on him so i didn't notice that i was controlling him.