Thanks for playing! I have some loose plans to address most of the issues you've come across, I'm hoping that after an update or two the game will open up a bit more for casual exploration. There are two silver keyholes both of which give gold keys, which lead to the ending area, and you get more bronze and silver keys than you need. The whole key puzzle thing is somewhat of a temporary measure to give players something to do until I can expand the game properly, I may have gotten carried away with the complexity a bit.