Opening the door didn't end the game? I've now clicked "open the door" twice, the first time I beat the dungeon and again when I thought I must have hit the wrong button.
Hey there, thanks for playing the game, I really appreciate it. It seems that some update over time may have broken the HTML embed as this is a bit old unfortunately. I'm playing through it again right now to see if I run into the same issue.
I just played through it on Google Chrome and was able to open the door; are you perhaps on Firefox? If I recall correctly, I think Firefox had some issues with this specific version of the engine I had used. Thank you for playing though!