Little update:
Still no real graphics in game, but I put in the danger that you need to manage whilst aiming for the highest score.
Basically you attack for 7 turns (links), then the enemy has a chance to attack you for a few turns. If you defeat the enemy (no animation or anything yet), your turns are refreshed.
The gems do the following:
Red - Charge up your power
Green - Charge your block
Blue - Punch the enemy
Black - Fireball the enemy for unblockable damage.
Yellow - Coins, do nothing right now
When you attack, your power goes down, and the enemy block is removed. When you fireball, your power is removed after being used.
Might be a bit esoteric to everyone except me at the moment, but that's where I'm at.
I'm also thinking about adding another gameplay element, just to add a bit more interest, not necessarily a complex strategic thing though. It might end up just being something that modifies the gems or converts some to one type. Not sure yet!
Mark