Great stuff! Finished it, not with the immunity poke, but with snapshots. Hence, lots of deaths while playing, but edited out here, apart from when I lost my two lives, as I inadvertently saved just after being struck with the sword! :)
Thanks for doing a gameplay video of my game. 
This is the best gameplay I've seen so far.
Most people give up at the first hurdle 
I developed it a few months ago in assembly language as an idea I had to make a game that was, above all, simple to program, about a medieval knight venturing into a castle.
It's true that I usually program in other, more user-friendly or simpler languages or graphics engines like Unity, JavaScript, Python, etc. but programming in assembly language takes me back to other times when I liked computing more.
Cheers!