Cheatcodes:
To get access to the game console and enable cheats, you need to start grom.exe with the command line parameter " -cheat" (to do that you can right-click on the game shortcut icon, select properties and enter the parameter at the end of the string in the target field). While in the game you'll be able to access console with [Tab] key and enter these codes:

const life - God mode
kill enemy - Kill all enemies