right out of the gate I really like how easy it was to understand this game, grasp its core mechanics, and then effectively use them. You did a great job in terms of readability. It was always very easy to understand what was going on and how many scales I would need to defeat a given enemy and what they would do if they hit me.
Perhaps my only feedback is that it can be cheesed a little towards the end by just staying relatively close and blasting with the biggest scale size. You automatically pick up the scales when you do this because of how big they are.
I think the core gameplay mechanic is really well executed and this idea of essentially using hit points as a ammo was super cool.
Great work!