Here is a cheat guide by editing the save files

Note: To avoid problems, save the original parameters to yourself separately before changing files!

How to Enable Cheat

* Go to: "your game folder" -> renpy -> common.
* Open the file "00console.rpy" with any text editor.
* Find the line "config.console = False" and change "False" to "True"
("True" should be capitalised), save the changes.
* Open "00keymap.rpy" in the same section with any text editor.
* Change the line "console = ...." to "console = ['`']" and save the changes
(the line "console = ...." is under the line "# Debug console.").
* Next, you can open the console in the game using the tilde ("~").
* Change the keyboard layout to English to start the console.
 

All Console Commands List

"player_strength=?" - change strength.
"player_agility=?" - change dexterity.
"player_endurance=?" - change stamina.
"player_coordination=?" - change coordination.
"player_vitality=?" - change vitality.
"player_health=?" - change health.
"player_stamina=?" - energy change.
"player_gold=?" - changing the amount of gold.
"player_fatigue_pool=?" - change in fatigue.
"time_left=?" - change the remaining time before the event.

Note:
*Instead of "?" specify a numeric parameter of your choice.
*To see all possible variables to edit enter: "long" and then "dir()".