Control is resource. The mod will provide desired amount of this resource for all players no matter of speed, physical condition, used input devices etc. Using 2 core functions: 1) tactical pause giving time to click more for slow players; 2) block UI depriving ability to click for fast ones.

BEFORE the game:

Choose settings for game: pause time per minute, APM limit, auto pause interval, manual pause availability.
Choose settings per player: preferred key to switch pause on/off

INSIDE the game:

Press chosen key to pause the game (if manual pause enabled). Otherwise wait for autopause.
Give some orders to your units. Watch out for your APM (top right of screen) and remaining pause time.
Press same key. Your UI will be blocked, while you are waiting for other players to do the same.
Play as usual, but don't waste your clicks. You have limited amount of them.

If you are running mod from StarCraft 2 itself logged in Battle.net, you may choose mod settings in game lobby as shown at the screenshots and explained above. You may add this to map in Editor as well (File -> Dependencies). If you do, you'll have defaults active:

~ (tilde) key for pause
Infinite total pause time
no APM limit
no auto pause, only manuel enabled

To change this defaults feel free to open mod file in Editor and change it in the triggers section.

Be aware that if you add this mod to a singleplayer campaign mission map, its probably not going to work properly. Its because campaings have internal timers for some plot events. Things like time between enemy waves and so on. These timers can't be stopped by Tactical Pause Simple unless they use special pausable time called - AI Time. So to make campaing mission work properly with pauses you are to replace all usages of Game Time timers with usages of AI Time timers. You may do it in Editor by using Triggers (F6) -> Edit -> Find/Replace -> Replace (Ctrl + H). Replaces all Game Time with AI Time as shown at the screenshot. And now your mission is compatible with pauses.

How to use & how it looks in-game:

https://www.youtube.com/watch?v=qsicr4xLXsI

https://youtu.be/66lHtyvl4EU

There is known problem that cut-scenes in missions sometimes may stuck. If you encountered such a problem just hit pause key 2 times. Should unstuck afterwards. Nothing can be done to fix it because of there is no straightforward way of implementing pauses in Blizzard Editor. So I am using some ugly workarounds.