Sly 1:Difficulty

Difficulty, also called suck, uSuck or noob mode, is the mechanic by which the game dynamically becomes easier depending on your gameplay.

Difficulty levels
Sly 1 has three difficulty levels: easy, medium, and hard. Each one has a corresponding global DifficultyLevel struct in the elf. During a transition, before loading the map, the function  calls , which sets the current difficulty level based on the following criteria:

This means that the Prologue, World 5, and hub maps are always easy, and all other maps are initially medium but become hard once you collect the key. Levels which don't have a key are always medium.
 * If the gameworld is GAMEWORLD::Intro or GAMEWORLD::Clockwerk, or if the current worldlevel is WORLDLEVEL::Hub, then it sets the easy difficulty.
 * If the FLS::KeyCollected flag has not been set on the current level, then it sets the medium difficulty.
 * In all other cases it sets the hard difficulty.

Suck score
The player is assigned a uSuck score between 0.0 and 1.0 for each individual level. These scores are stored on the level states in the save file. There is a global DIFFICULTY struct called  that tracks some difficulty values and stores a pointer to the current DifficultyLevel struct.

Changing suck
On the easy and medium difficulty, your uSuck increases by a 0.1 each time you die. Triggering a checkpoint for the first time lowers your suck by 0.8, and collecting a key resets your suck to 0. These changes happen by function calls to,  , and   respectively.

On the hard difficulty, uSuck is always locked at 0, even if something would normally increase it. This is because each difficulty level stores a limit that the suck value is always clamped between; for easy and medium, this limit is from 0.0 to 1.0, but for the hard difficulty this limit is from 0.0 to 0.0.

Lucky charms
After loading the map, the game calls. This function compares the player's current uSuck on the level to the current difficulty level. The values of  and   are determined by the currently difficulty, but for some reason they are the same for all difficulties. However, you will never get a charm on the hard difficulty because your uSuck is locked at 0.
 * If the player's current uSuck on the level is above, it gives the player a silver charm. This value is always 0.4.
 * If the player's current uSuck on the level is above, it instead gives the player a gold charm. This value is always 0.8.

Coin drops
Difficulty also controls how many coins drop when you break something or kill an NPC, but this is not affected the difficulty level. Each time the player breaks something, the function  is called to calculate the number of coins to drop.