For a first game project, this is well made! I didn't finish the game, but it was fun while I played it! Some things that could be improved on is adding checkpoints, making sure that each gameplay segment of the level complements the platforming mechanics, and giving the player a way to defeat the monsters. Considering that you're playing as a knight, I was hoping that I could at least jump on top of the slimes to destroy them like in Mario. But all in all, great job! (Also, shoutout Brackeys, "the Unity Godot Jesus")