HELP ME!!! I CANT GET MOVING TO WORK

i am makin a top down game but i cant make my character stop, they will continue moving and i dont know what to do about it

Keyboard
Down: --> # --> Velocity
Up: --> 0 --> Velocity

thank you
here is my game so far

uhhh

Where’s the link?

i got it working

but any way here is the link

https://flowlab.io/game/play/1381229

(my friend was constantly refreshing the play page so those plays are not legit)