Here’s a pretty basic mod I’ve made — The Polygon Tree. Its current state is pretty similar to other mods, but it’ll get better later.
Endgame (v1.0): 1e19 pentagons (i.e. unlock hexagons). The prestige button for hexagons is currently hidden, that way you don’t accidentally reset and lose a lot of progress (Hexagons have pretty much not been started yet as of now)