Used keys in wrong order?

[Toybox]

Thanks for the comment, SandyBean 
The shop should have refilled! Maybe the suppliers got caught in a traffic jam

This mansion is actually an adaptation of one of my two all-time favourite Sega Master System games¹ (Wonder Boy III: The Dragon's Trap. You can even find speed runs on youtube!) And I should say, it's as faithful an adaptation as I could make!

¹ yes, I am that old