i loved the idea of being able to play an rpg from the monster's perspective. however, despite being tipped off in the initial instructions, this part of the game seemed the least properly filled out.
the human party had far more to properly do, despite being less interesting and could level up while the slimes couldn't even earn gp to heal from the encounters that were available.
i also encountered the bug in the silver sanctuary regardless of which path i took, so i can only evaluate the game before that point.
some ux notes: dark text on dark backgrounds is basically unreadable, but it's used for two pieces of 'key text' in the game. also the boss guardian creature forgets that he was defeated if you leave and come back.
i would have liked to see a far reduced scope, and rather than having so much stock map to explore, would prefer more interesting character interactions, and something that really sells the hook of the solid, liquid, gas, plasma system.
great effort, hope to be able to see an update!