So the movement was a bit weird, with the dog following me I glitched through multiple walls. I ended up just leaving the dog behind, which apparantly doesn't even matter because the dog doesn't do anything. Nothing would have changed if the dog didn't exist. Same with the pickup mechanic, only used for the first door so felt kind of pointless. Maybe some obstacles only the dog can pass like a vent, then a door that can only be opened from the other side.
A great effort for 48 hours though! I can see that there is a lot of potential there. Keep at it!