Just finished playing your prototype! It has it's very apparent Castlevania feeling to it and I was wondering if that was the direction you were actually wanting to go in? If it is then you nailed the general feel of it (besides perhaps making the forward jump just a tad longer in distance).

What kind of visuals were you ultimately going to want for the game (theme etc)?  I can see the project going in many different directions thematically and that is probably a good sign. It means the very base core loop is solid enough to have a lot of potential! Thank you for sharing your game!