I love this concept, it is genuinely the best I've seen in the entire jam and beats out just about any triple A game I've seen.
It's a bit rough around the edges and I will give a few points of criticism, but just know I love this game and you did a great job.
Firstly, overall UI improvements would be nice. A description for the tiles, highlight the one you pick and add a sound effect, let you remove or move around tiles you placed, and so on.
Secondly, a speed up button of some kind would be amazing. The knight moves a bit slow and there's a long pause between hits in combat.
And lastly, a bit more of a tutorial, or even more gameplay to get used to things a bit more. I'm still not 100% sure what all of the stats do or what exactly some of the tiles do.
As I said at the start though, amazing game. The concept is the best I've seen in this jam, by far. It's got great art and music too.
Edit: I realize now you can override tiles and there is a sound effect when you click, I'm just an idiot XD
Edit 2: Oh, and there are descriptions for the tiles too... I'm very blind wow, I didn't spend enough time on the game before I made this review whoops