Stats
There are 6 statistics that enhance the player character. Statistics have a value between 1 and 9.
The primary way of increasing stats is collecting Stat Up consumables, like 
Luck Up, that permanently increase a stat by one.
Other ways to increase stats include:
The game doesn't track stats over max. This means that if you have a stat at 9 (max) and then gain and immediately lose a stat, your stat will drop to 8. This can happen if picking up and dropping 
Loki's Bargain when a stat is maxed.
Summary
| Stat | Effect |
|---|---|
Ability  |
Improves your abilities. |
Damage  |
Increases weapon damage. |
Luck  |
Better drops from enemies, chests and gambling shrines. |
Precision  |
Increases critical hit damage. |
Range  |
Increases weapon range. |
Speed  |
Increases movement speed. |