Note that if you have a slower Macbook Pro (2014 or older) you might want to launch the game at 720p instead of 1080p, it's more responsive for me this way -- I have a mid-2012 retina running MacOS High Sierra 10.13.4 and the below runs best so far:
tell application "Terminal"
activate
do script "cd '/Users/dan/Library/Application Support/itch/apps/FPV Freerider Recharged' && open ./FPVFreerider_Recharged.app --args -screen-fullscreen 1 -screen-width 1280 -screen-height 720"
end tell