I thought this game was well-polished. I really liked the auto jump mechanic that you had. And the sound for the walking fit so well with the knight's armor and movement. I wasn't able to open up the protal. I thought I had gotten all 3 potions but maybe I didn't. I died a couple times the first time I went through so maybe I'm mixing up my plays.
Moving around looking for the last potion did feel slow but I didn't think it was bad. Sorry I couldn't get passed the portal :(