I have been made aware of a bug that causes the game to crash during the intro cut-scene if you attempt to skip it, and I am currently working on a solution. However for the time being I have removed the cut-scene as a temporary work-around.
Also, given the nature of the arcade mode, I have decided to make the number of wins required for unlockables "scaling" instead of a flat 3 per character. So unlocking the first two will require less tokens, while the last one will require more.
(If you already downloaded the game, you may have to reinstall it to apply these changes)
Thanks to those who brought this to my attention, and please continue to let me know about any recurring issues.