Noita is a game based around the concept of a chemistry engine running at the pixel level. It uses a custom rules engine written in C++.
It's one of the more interesting games I have ever played.
It's one of the more interesting games I have ever played.
Here is someone using a (really complex) wand to beat the game in 2 seconds (some spoilers): https://youtu.be/YYTB5_zBANg?feature=shared&t=309