Make Minesweeper
Similar (I don't know how much more difficult/different it'd be to implement):
Somebody recently made a newer version (free on Itch) called Dragonsweeper. I never really understood the appeal of Minesweeper, but this version makes it click for me (aside from more elements, the math and piece logic allows for more deduction). That, and it probably helps that you can make informed guesses (particularly further into a game) as the mines are not the main focus.
Their version is highly engaging, though does not currently include configuration or even a replay (after win) button.
It's got me thinking that I want to make my own version, half as an excuse to make polygonal* art.
The first-step oversimplified version of this would be like normal minesweeper, though you:
- sum the value of cells (not just checking if full/empty)
- allow marking with numbers, not just a flag
- have mines be a value of 100 instead of 1
- add smaller-value tiles and a system to pace their removal (some freedom, can still lose here)
- re-sum neighboring tiles when a tile is removed
*= I have done 2D in-engine, 3D via blender+vertex colors, plus general material/shader tinkering.