Hiya
Version 1.2.0 Windows:
• Service Elevator 1F is still broken (you walk behind the doors and then get stuck) if you come from the bathroom side. All the other elevators seem to be working properly now.
• Jumping is definitely better but I only discovered by accident this time, while trying to win the boss battle and constantly dying (again, haha), that if you long press the space bar you jump higher, so that partly explains why I struggled so much before - I tend to tap the key, not press it. Once I figured that out I had no problems with the boss battle and I assume I would find the glitch guy easier now too.
• The "J" looks like a light fitting or a pipe, rather than a letter, since you've primed people to understand that keys are in a box and pop up top right of Harold's head, so I don't know that all players will realise it's a hint for the attack key.