read the ctrlr doc in the docs folder, you still are doing it wrong.
Basically, first delete your mk.cfg file in the cfg folder.
Then make a folder in ctrlr folder, call it something like "myarcade"
then make a mk.ini file with the mappings.
then call mame like "mame -ctrlr myarcade"
BTW, your issue in the tab menu, you paused the game, didn't you?