It's a good start.
The concept is pretty good and I enjoyed working with the combinations. Two things points of improvement, however:
- A guide would be very good - it took me a while to understand just how the different components react together.
- Randomness is FAR too influential in the game: Your opponents, your win bonuses, and your reagents are all completely random, which makes some battles impossible to beat. Being able to choose an opponent mitigates this, but not enough. Additionally, critical hits make it very frustrating when a sure win turns into a loss; the opposite rarely happens because you generally try not to head out into a battle that relies on a critical for winning.
This last element made me eventually give up on the game. I'd generally like to see much more choice: Maybe I could pick or buy reagents, or have some way of combining them into new ones. Skills and abilities with each level would also be nice, but not necessary - the point is giving the player more options.
The game might also benefit from different difficulty levels.
It's a good start and a great concept, I hope you will improve on it.