Interesting idea! It felt like all the decision making was on the cleric side; all the warrior options advanced the fight, and there never seemed to be a reason to pick one over another at any specific time, just as long as you used the high-damage attacks more overall. If the dragon had bigger, telegraphed attacks that you needed to defend against, that could be a way of making the warrior side of the decisions matter more?
Overall it works well, and is a very decent first jam submission. Good job!