First of all, I would like to say that the game is very complete, from character design to map drawing, I can see that you as the designer put a lot of time into it. At the same time, there are a lot of details in your game that I really like, for example, the energy gathering process of the archers shooting arrows, the fireballs from the cat monsters exploding when they hit the walls, etc. In terms of improvements, I think you can add some items that regenerate health, otherwise the final boss battle will be too difficult due to the loss of too many people.