If true is false and false is true, the sprite refuses to move.

https://snap.berkeley.edu/snap/snap.html#present:Username=snapenilk&ProjectName=If%20true%20is%20false%20and%20false%20is%20true%2C%20the%20sprite%20refuses%20to%20move.

Very good

Here's another one: creep-bee list? by snapenilk | Snap! Build Your Own Blocks

You make good projects like these

Thank you.
(I guess the exception to the "don't quote the entire post" rule is if the post is short.)

No, I'm wrong.

I think I fixed it (change full:true to full:false).
Don't do that with long posts.