Fixed boss 4 exploit breaking arcade mode. To be clear, the exploit is still there but now it shouldn't break arcade mode progression.
The game now checks for achievements in the extras screen too, this should fix some achievements only triggering after rebooting the game.
Medal requirements have been lowered again in Poplars. Poplars-5 is no longer medal locked and Estuaries-1 and Poplars-Boss got lowered down by a couple of medals.