Yet another galaxy idea

in game tweaks, you should have an in-game time speed changer that affects the simulation speed of the game
With a warning of it may make timewalls more manageable, but further progression will feel less awarding

Could be a good idea if the game has an extreme amount of extremely long timewalls.

You can't really do that, games don't use the same formula for devspeed and some might not do it at all