Thank you for playing our game! 👻👻
To answer your question, pressing the number pad was a debug tool to test out each level. 0 goes to main menu, 1 goes to the mechanic testing room, 2 goes to level 1, etc. I could have removed it by the end, but everything else was working and I didn't want to accidentally make a significant change that would require another round of play testing at the very end of the project haha. So I left it in figuring the chances are low that someone would run into it. But you did so congrats on being the first!