Spoiler: Hints R Behaviours Spoiler: Tip #1 - will not pass stairs with a rail under the block ahead (even if the rail is sideways) Spoiler: Tip #2 - will not pass stairs if there isn't anything under the leading stairs Spoiler: Video Solution
@ridgerunner - The solution video was around 5 minutes so not too short but yes compared to @huijiuggbf's level - very short. Thanks for playing.
I got a trap at top part and it took me5 attempts to do this again. And it's enough for me when I'm struggled at the lower part.