For a proof of concept, this isn't bad but I worry you might not be setting your best foot forward for a crowdfunding campaign. The dungeon crawling is satisfying and the combat feels fast and weighty, but it feels like there is a lot missing, even for a demo. The complete lack of music or other sfx makes the world feel empty and it seems like there are some mechanics that have only been partially implemented like whatever the pickups were throughout. I'd be interested to see where else this goes though. Best of luck on your campaign!