[eli]

Sadly it is a bit out of date (requires Flash), but there is a neat game/simulation where you can test out different redistricting strategies SimCity style: http://www.redistrictinggame.org/

There are no easy answers. I believe the game makers advocate for independent non-partisan commissions who are restricted in how they're allowed to create maps.

[lambertsimnel]

You might be interested in this web-based/mobile/PC game about gerrymandering from this year: https://chequered.ink/districts-game/