Hi vincentgr! Yes there’s coop mode, or better called ‘assist’ mode. Player 2 can assist Player 1 by shooting cannons, turrets, enemies, coins and also functions as a trampoline. But because Player 2 can’t die it’s more like a gimmick than real coop mode. That’s why it was a ’hidden’ mode at first but I decided to already show the password for 2 Player mode after completing the game on normal difficulty. But I probably should have also said this in the Info screen. Well now it’s still a surprise to some. ;)