That ending gave me a chuckle lol. That was a pretty fun game! It got a little challenging at times, but thankfully the checkpoints were placed just frequently enough to not be frustrating. I liked the simple art style, though I wish the character had some kind of outline or something that contrasted with the dark background in the underground section. It was a little hard to distinguish, at least for me.
Overall, really fun game! I couldn't decipher the morse code (sorry) but I thought that bit was pretty cool to have. Good job on the game!