Ran into a similar issue to Eli1331y, where as I was backtracking with the lamp, the character dropped it just before I was about to go through the "door." Back tracked, picked it up, but as the previous stage was loading, it made the lamp-dropping sound and the screen remained black, couldn't do anything.
I didn't get far so the review is worth what it is, but I love the aesthetic and music. I'd recommend actually displaying the controls for the various mechanics as you introduce them, and maybe making it a bit more obvious when the text in the dialogue box changes? Maybe making it a speech bubble over the character sprite rather than a UI element at the very top of the screen.
Overall though, awesome job with this! Didn't get a chance to fight any mobs so not sure how combat is, if there is any combat at all