I also enjoyed the game it was very fun to play. For me at the time when I played all movement parameters were good I didn't have any problems with them ( but I do not know if you made any adjustments since vecima's comment). I would just want more levels :D , game ended very quickly but the mechanics are solid and fun and have a good "feel" in my opinion. I tried to jump on the orcs heads and I think the player can get stuck/stunned/shaken this way.
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You probably played it after the controls were updated. I changed the knockback and uploaded another version that stops the orcs from chasing you (which is why they stayed under you) and pushes you a bit farther away so the knockback causes the player to move faster than the orcs do. you might take 2 hits worth of damage now but that should be it unless you are stuck against a wall or similar. Thank you for your feedback. it is appreciated