At the start I thought it is quite impossible to save the soldier in later phases, but once I understood plus and cons of single methods, it was possible.
What I was missing most was more feedback from the game that I can use another herb. Using some sound as an indicator might help a lot. It is also a pity that some sprites are blury. Keyboard controls are little bit clumsy. Sometimes it is better to asign keys that are close together even that action starts with another letter.
What I liked was the concept of three components you need to fullfil. With some additional layer it might be pretty fun.
For me it is a good job that has some things to work on.