How to make projectiles

Hello I want to make projectiles that freeze in in reaction to other abilities in my game
for example

https://www.roblox.com/games/5732973455/HOURS

this game has the general idea how would I go about this

In the trailer it looks like the screen updates are done in the runserver.stepped arena and has a global bool variable that has to be true for the frame changes to take place so changing that to false would have the screen freeze until it is true again.
Like a pause option but run by code instead of a button the user can use.