Potential QoL improvements for the game itself (maybe ChatGPT would have suggested them if you asked it?)

- Ability to mark cells as "locked" (i.e. "definitely present"). It's hard to play it on a larger grid since you have to keep it all in your head - Built in calculator of some sort where you could multi-select a few cells and it would show their sum somewhere. Otherwise it's too much arithmetics to do manually