itch.io

Uses two-dimensional "sprites", 2D images created and used on a flat plane, as opposed to the three-dimensional models or environments found in 3D games.

Projects that use a Hexagonal Grid. Cells that have 6 sides.

Games where you have to manage resources in order to complete objectives. 

Involving mathematics

Games which have short playtimes and can usually be completed in one sitting.

Resources for building and relating to User Interfaces, how the user interacts with your program