The Symbols
Clover - This represents your "Luck". Every swing you take at an enemy will hit for a range of points. For example, a weapon with a range of 125-250 will hit for any number of points up and down that scale. The more "Luck" you have, the more likely you will be to hit for a larger number on that scale, therefore requiring less hits to defeat the enemy.
Lightning Bolt- This is your energy. An extra point in this category will increase your maximum amount of energy. More energy will mean you can play the game for longer each play session.
Sword- The sword will increase the maximum amount of damage you can inflict. Take the same scale of 125-250, more points in the Sword category will change this from 140 - 270. (These are just examples, the actual amount will vary) Stronger hits mean less energy to kill an enemy.
Heart- The Heart is your health. The more points in this category, the more health you will have. More health means you can take more hits, so there more time in between when you will need to use health items like the bandages or pills.