You'll need autohotkey for this script to run.

Once installed, right click on the Desktop (or wherever you want to create the script) and select New > AutoHotkey Script.
Right click on the new file and select Open with > Notepad.
Then paste the code at the bottom of the file and hit save.

Start the game, switch to windowed mode (Alt + Enter), double click the script file to run, select the game window and watch those taps increase!