I appreciate the skill involved. It makes me think of the old school platformers and once I got the hang of it, it became alot of fun. I look forward to the sequel.
That being said, i'd love to see the same mechanics with upgrades. Let me buy or unlock faster speed and higher jump, double jump, triple jump, armor, and daggers to throw. I like these kind of games where I can end up in god mode. I think a whip would be cool, unlimited ammo and that I could buy extra length for.
I really enjoyed the game, but you should put in some stats. I'd like to know how much damage each weapon does and its rate of fire. and it'd be nice to see my hp and ring bonuses on the hero page. I can't wait for the second one.