Soulfully primitive and enjoyable for the novelty that it is. I love how you blatantly cover up the character designs so that you don't have to draw them, as it's exactly what I do myself.
The music popping out of nowhere and being unironically great was hilarious and made me laugh out loud. Kind of reminds me of the fakeout on the NES Solstice title screen.
If you are making this game as a learning experience you can probably incrementally improve it until it's actually good. Fix the jumping jank and there's a surprisingly solid base here, despite the visuals.
Incidentally the mechanics here are a bit like Narazoth's Castle on this very same DD.