No idea what the current cheat code is, but I figured out how this game checks for it and how to hack it. Open up inseminator.html in a text editor, then find where the code is checking for $storyData.cheatCode (for version 8.1, that's lines 5800 and 5801).
You're looking for something like this:
Code:
<<set _val to hashStr($storyData.cheatCode)>>\
<<if _val !== '10303041226373803929183030291439'>>\
Remove the "hashStr" and the two parenthesis it's tied to, then change the long numerical value to whatever you want. I set mine to 666 because it's thematic with the game, but it doesn't matter. It should look like this after you're done:
Code:
<<set _val to $storyData.cheatCode>>\
<<if _val !== '666'>>\
Congrats, now when you hit the "cheats" button in the menu, you can type in 666 (or whatever you chose) and the game will accept it as a valid cheat lol.