How about a Potion of Lust that makes every (1 tile)enemy (and item?) look like stationary damsel until you rescue a real one? It could be combined with potion of love maybe without guaranteed damsel spawn at next level. That way it'd have both positive and negative effects.
What does potion of love do when given to the one damsel?

Using potions on others isn't very intuitive I think it should either always work on whatever it's thrown at regardless of target's state consciousness or by "buying" a potion while carrying someone.
Also bubble should work on others maybe confuse should too at least visually.

Making water cure confusion could be nice.
There should be some sound effect for drinking potions.

Full bottles don't break but empty ones do? I might want to refill that empty bottle!

Can someone list all the potions and effects?

red, green, black
confuse, bubble, -5 health, +1 health

I love the idea it would be nice to be able to read some information about encountered things accompanied with some nice art it'd be perfect also it could be used for all kinds of nice little unlockables like item related minigames and other things.

Indie games mean indepently developed games as in not made by some big mainstream publisher.

Legerdemain(very roguelikeish) and Notrium are pretty good games.
Tremulous is also very nice online FPS with some RTS elements.

Oh?  Doesn't a normally-solid body vanishing in blood, on top of a bloody altar, do enough?  Or are you interested in something more like a visual indication of how much favor you have earned with Kali?

--Delmion

Most enemies disappear in a rain of blood so when an enemy that hasn't disappeared disappears it isn't that surprising or in any way special looking so no it doesn't do enough. But if there was also some unique effect that couldn't be confused as something else it'd look less like some random thing or a bug happened to destroy the body and more like a sacrifice.

There'd be very little to translate so making translation unnecessary seems simpler.   
Altough translations even if unnecessary would probably help make the game more known and approachable.

Generally I prefer if things are also told in some way without text when possible as it's usually easier for brains to connect and understand something more visual. Which is why I'd also suggest that sacrificing should have some more visual effect that would make it clear that a sacrifice was made and not something else. A flash of light or something.

Having own icon for each level feeling in addition to just text would be nice as it can be quite easy to miss what they were if you dont pay attention also there aren't that many things in the game that require being able to read english besides them.