Reminds me of Corruption of Champions.
If you started as a human it's not very easy to be human again if you've messed with transformitives.
I actually kind of like it when the player is held to consequences like that. In real life changing your body radically is usually irreversible.
Absolutely! Without consequences the transformative aspect becomes just a description change, not part of the game play itself.
Speaking of which are there any racial perks planned? It'd be pretty cool if you receive and lose perks via transformation.
I have been considering racial perks and hinderances too., but they aren't implemented yet. An obvious route would be to adjust the classic RPG stats (str, int, dex etc) in line with your species. Certain species may have other (sexual) advantages too. I'm toying with the idea of time-of-day changes; some creatures more active during the day, night, or at dawn and dusk. It could also affect sleep patterns; felines, for example, needing more sleep but benefiting more from quick naps - that may be too irritating though. Not sure.
What is already in place is different sizes of creatures and whether or not they can get into certain sized doorways and so forth.
Then there's animals that can swim or fly. Swimming isn't so much of a problem, but flying is. There needs to be some way to stop the PC from just flying over obstacles that act as puzzles or advancing to harder areas of the game before they are ready. I'm not at all sure how to handle that. Maybe just not have any winged characters as a starting race, and only make the transformative item available late enough in the game to make it so the player is aware of the consequences.