Great jam, presentation is excellent across the board and really helped create an atmospheric world to explore.
Regarding the gameplay, I struggled to find a reason to switch between fire and ice often. After the first encounter with the stretch of water where you need to freeze it I was hoping for more puzzle elements like that to solve but it was mainly fighting. Don't get me wrong, the combat was great! After I died a couple of times I did find myself running past all the enemies to the end of the level because there wasn't really a need to fight them though. Perhaps if there were a couple of gauntlets where you have to defeat all the enemies in a room to progress then this could test the players ability to fight and switch. Also I think the ice only worked on the big knights? I could be wrong.
One part I really liked was when I had to jump over some planks but I couldn't see them clearly in the darkness. I shot some magic across the room and it lit up the other planks for me to be able to get to the other side which was very satisfying so that kind of gameplay could be a great fit in this if you plan to work on it in future.
Overall a fantastic entry to the jam, loved the look, the sound, the feel and the story. Great job all of you!