I saw your game at BCN Game Fest but I didn't get the chance to finish the demo, so... here I am :)
The demo is fun, pretty straight forward and simple; it gives a good vibe and I would love to try the full version once it's completed!
I have anyway some small feedback for you ;)
1. I'm playing with an Azerty keabord layout (it's the drawback of living in France), and having the jump on Z but the two action buttons on X anc C seems awkward.
2. I can jump both with the Up arrow and Z, but when I want to "jump down" I can do it only with Z.
3. With pumpkinhead I was expecting to being able to shoot crows facing up, not a big deal tough.
In any case, you have my follow! Good job!