Careful steps

Hi and welcome to the forum. In the future, you'll get better results if you use the Export button to make the card image.
As for the level. B does not like low ceilings and continues to walk until he's not directly under a block. We refer to this as "Claustrophobia" and consider it a playable bug in the game. It can be stopped by tapping in white space, called "cancel tapping." Since you used it, I used some other bugs I know about to shortcut the traffic elements and get to the exit before the ZapRs congregate in the corners.

@Don G Rowe Thank you for the advices. I didn't know about that bug specifically and was wondering why B runs under them so fast and had somehow unknowingly used that "cancel tapping" mechanism.
It would be great if you can reveal the bugs you used as shortcuts. This is the 1st time I created a level so do tell where I would require improvement in.

The tricks I used along with others that are common are in this post as a tutorial. https://mekoramaforum.com/threads/design-lesson.552/