This is a really cool take on alchemy! I love that the mechanics actually match the theme and that there is a logical explanation for them. It was kinda difficult to control the character in the air, and I kinda missed an indicator what the order of the metals was. I kept forgetting it :p It also took me way too long to figure out that gold is heavier and that I had to switch from Iron to copper to go up the portals ..
Really polished creative game, thanks for the fun!