There are some really nice puzzles in here. I really liked the way new elements were introduced.
Level 23 took me the longest to solve.
Great stuff!
Viewing post in Pink Box Escapes The Room comments
The only UI edit I would suggest would be the notification area of the activation like "Belts direction inverted" be moved or made less intrusive. On some of the later, larger, levels it would cover up some switches/buttons that sometimes needed to be precisely interacted with (turn off a belt then rapidly navigate stopped belts.