I ran into a bug where once I died and was sent back to the title screen, when I clicked Start the title screen didn't disappear, but I heard sword swiping and clanging so the game was still playing in the background :) Another bug I had was that I wasn't able to click to walk if there was an item on the ground or a spell effect there. I also seemed to lose health without the knights actually taking a swing for me, so it seems like they were attacking me but the animation didn't play.
I was able to restart the game and play it and it was fine.
I'm rubbish at this game, I found it difficult to play, but got easier the more I played it. I think the knights take down the stations too quickly, even on easy, and when I use the fireball it passes straight through them without damage sometimes.
Overall though it's a great game, I enjoyed the concept, especially give you've got a years experience. Love the aesthetics and the music and sfx are nice.
I didn't understand what the green potion did, I thought maybe it was health but didn't notice my health going back up. That purple spell is the best though, just set it on the floor and watch the knights perish, great when I didn't have time to run between the levels to fight them off.
Great work.