Solutions for those who got stuck:
- The number of concrete bricks
- The colors of bottles on the sink
- Use the shovel to reveal the cigarette, then follow the numbers on the grid, as mapped to the can, nails, and cigarette
- The number of lights in rooms with paintings, ordered by the number of paintings in each room
- Use the colored circuits on the switchboard reveal the numbers on the monitors next to the vegetables, order by the vegetables next to the door
Main criticisms (places where I got stuck for a long time):
- Nails are way too hard to see at first, which makes the grid very confusing
- Having the two paintings separated on opposite walls in the switchboard room makes it hard to realize there are 1/2/3 paintings and thus an ordering, so it becomes faster to just brute force check the last digit on the final door