Nice little game, and I really like how you combined the platforming with the rewind ability. The controls could be improved by not having the rewind button on the same hand as the movement. And the hitboxes seem quite punishing sometimes, but the levels are short and the reload is fast, so it doesn't feel frustrating. Actually often the reload is too fast, so the knight still reacts to buttons pressed before he died, which usually means you die again right away. Maybe taking player control away for a second before the respawned knight can move again could help adjusting that.
But overall great job. Would love to have your guys' feedback on my entry as well. It's only my second game ever, so notes are highly appreciated.