I recently decided to play through all the published Rabbit Escape levelsets and they were brilliant! What a superb experience to relive the pain.
I discovered (and have probably since forgotten) new solutions to some levels and got very stuck on multiple occasions. I even discovered a few new exploits where the rabbits didn't behave how I expected.
E.g. Did you know that you can get a rabbit to go splat two cells off the floor by using a brolly token?!
The hardest levels by far seemed to be Rabbots 20 (Three Drops) and Water 20 (Glass Half Full). I just watched Andy's video of Glass Half Full and my solution was a little different, but had broadly similar ideas.
I've also been sharing this with a younger generation of rabbit lovers, who have been gradually learning how to use the pause button to get exactly the timing desired. What a gem of a game. Hopefully this will encourage others to go back and puzzle away.