Xanco's Customisable Difficulty Demo
A downloadable game for Windows, Mac OS X, and Linux
This game allows you to manually set various parameters so that you can customise the difficulty! Comes with some pre-set difficulty modes. You can find the asset I used here.
This game is referenced on a video called "The Evils of Difficulty DLC - Xanco Talks Gaming" on my YouTube channel.
WASD - Move
Left Mouse Button - Shoot
R - Restart
Warning - I don't have Linux or MacOS, so I'm placing my trust in Unity to make sure those versions work.