I really enjoyed this game! The movement is super slick, and the protagonist makes you feel like a mashup between Link and a Dark Souls knight. The art in general is cool. Controls worked as described, and the healing / time regeneration speed felt perfect so I never had too much or was left wanting more. The rewind feature was cool throughout -- I used it against mainly the ranged enemies.
My only nitpick is that the feature didn't work properly on the final boss whenever I wanted to pull them back into frame, though we could chalk it up as them perhaps being just immune to it :) . Also the feature may shine more with some dangerous platforming elements -- that way if you miss your jump it's a perfect reason to use rewind outside of combat.
Awesome work and congrats on your first game jam! It was my first too, feels great doesn't it?