The presentation in this is fantastic! Love the art, music, & sound effects, they all make the presentation have a clear vibe that is very atmospheric. I like the mechanic of traversing with the grappling hook, using it to attack enemies and explore the map was very satisfying. The boss fight was a really cool highlight, I like the dragon's design and defeating him felt cool (Although I wish the back wall was closer to the fight, so I could use the grappling hook to avoid his fire. In this version I did a lot of grapple hook spamming to the dragon to defeat them).
My main feedback is that the rule changes don't seem to mesh well with the current version of the game. I was hoping they'd impact the game a bit more directly, I would be interested to see them effect the grappling hook in some way (As of now, the two mechanics feel entirely separated). That said I'd love to see you expand on this and where you'd take it next!