Hello! soda here
omg i love the idea so much! and in the span of such a short time its really impressive.
im gonna nitpick here but i will give you how im honestly feeling. most of what i have in mind is better UI maybe have some kind of side bar or top bar to have the knights and a bigger play screen. again its not a problem and doesn't affect my enjoyability but it will make the game look more polished
it would be nice if the knight's size or color changed when it levels up, i can 100% tell if its a leveled up knight but it will give it more flavour as its more encouraging to level up a character if they get new appearances, or atleast thats how i feel. adding an animation for attacking or taking damage would be really nice too.
this is all just tiny nitpicks that doesnt define the game, really nice keep it up!