Dont upgrade the bank

I love this game, but dont upgrade the bank. Mine is 6/6 level, only gives 326 gold. Every time. WHILE AT A LEVEL 2 BANKER. I GOT 4K GOLD. WHAT! Its broken or a glitch or something. Armor games, pretty please fix this :/

Someone from Nerd3 Video about Soda Dungeon, v1.1.02