I would've wanted to implement blood on enemies, as for the screen blood for the player !
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The screen blood for the player was well done. I tried to kill the monsters, but couldn't do it, so I thought it was impossible and run from them. Later I saw the comments here with you telling they have a very high HP. In a case like that, maybe a simple progressBar from Godot would show the player that they can indeed be killed. But gamejams are like that, a lot to do in a very short time, sometimes not everything ends up working out. :)