Thank you for taking the time to play my game and to leave a comment.
I agree. The game lacks something that conveys the the effect of actions. The defense and healing strategy is a valid tactic and is fair play. There is a penalty for when an attack exceeds the defense, but the computer logic isn't capable of noticing repeat behaviour and capitalising on it by using a powerful attack to inflict even greater damage.
I would like to continue development on this, as it is extremely incomplete. My goal since the start of this year is to submit to a game jam per month for this year (I'm now up to 7 with Greenlight jam being completed!) - I've learned a couple of new concepts from this game jam alone, so I want to accumulate more experience and knowledge from making more complicated games before attempting to make improvements on previous projects.
Thanks for reporting the UI issue. UI and artwork design is still a weakness of mine, so the entire UI needs to be redesigned once I get the chance to continue development.