Thanks for the review! The key is needed to open the doors that you could find in the dungeon. The game does not consist of one dungeon, but many ones, and in each one you must collect as much gold as possible, find the key and open the door that you also had to find.
I will give it another try in the morning (12:50pm here in Aus XD). Sounds like fun,I thought that might be the case, I just got addicted to collecting chests and watching the coin count rise ahah
Ha-ha-ha, yeah, that thing just gives a lot of dophamine! Everybody loves seeing how their bank account rises with a lot of money from their inheritance!