I'd like a year in which nothing bad happens, as a control group

All ore boats look like that, they're constrained by the size of the locks at the Sault and the Welland Canal

Could always do it museum style, where the player can walk around and see the models at their leisure

What part(s) are you worried about? Ui or data stuff?

Could you aim it a load bearing wall and undermine a whole building?

Never too late for more features 😈

If it ain't broke, keep fixing it until it is

Foucault was right

Lastly, action games are highly-concurrent, formally an intractable series of interlocking differential equations without closed-form solutions. So we use numeric approximations, which in variable timesteps introduce intrinsic RNG . So high-level players cannot reliably "reach the ceiling."

Adding on to this:

It's so much easier to add a feature to systems that are already working reliably. Aim to always have your code in a working state (even if it's ugly/placeholder), then you can see how it acts in context.