Really cool demo! I've found 2 bugs here: 1) You can increaser your money if you sell and buy atmosphere many times 2) Assets of winter nature and warm nature overlap if you sell and buy temperature many times
I needed to add player movement somehow and still control where the player could go, so I ended up thinking that swapping the player and the enemy was the best idea XD
If you really made the HP bar out of the scrollbar, here's a tip: use Image.fillAmount for same thing. I'd add two images: a red and a green, the fillAmount of green would be controlled from the script (i.e Image.fillAmount = Helath/ MaxHealth) and the red one would be just red background