Mari0 is easily the biggest game so far developed on the Löve platform. There is a glitch with the game on OSX. when jumping the game is slowed down and this is immensely annoying; however, there is a fix - turn the sound off.
I have spoken to the developer and the fix for the sound is out of his control.
Devs at Löve, PLEASE CREATE A FIX IN YOUR ENGINE!!!!