@redSprite right… this is an issue with how i defined the blocks in this extension.
for now, i made a workaround for ya. add this share link to your game as an extension:
this will add a single block to the “Custom” category in the toolbox:
this block does nothing but tricks the typechecker into thinking a sprite is a MenuSprite. you can use it to wrap the “value” variable in your example above. don’t use it on a regular sprite, since you’ll probably get an exception.