There exist 6 possible states for every square on these 5 by 5 grids. Using the formula: nCr = n!/(n-r)!r! --
(where n is the 5 by 5 grid (5x5=25) and r is the possible states (6, not accounting rules of which stop one object tiling the plane or 3 figures of a person)
-- we get 25!/(25-6)!6! which simplifies to 25!/19!6! and when solved, we get 177,100.
When put on a grid, ( sqrt(177,100) ) we get a 420.83250825 by 420.83250825 grid.
Yours well exceeds over a thousand. Either there is a problem with your program or this "library" is infinite. The concept of the Library, Canvas, Box, Book, e.t.c., of Babel constitutes the following knowledge, that given every single possible combination or permutation of letter, number, color, or physical particle will contain a noticeable or discernible pattern congruent to the real world.
As your "library" is infinite, it does not hold true to the ethos of babel and therefore, your title is misleading to those who concern themselves with such matters.
-the landed exploration ship should be a unique building
-building that increases the capacity of nearby homes
-machine parts factory gets a bonus to production near the mechanical house
-the alien ruins should be in the category "Decoration and Nature"
-factory pubs give a bonus to refined metals factory
-detailed statistics of crafting recipes (so you can find out new ratios for buildings when you upgrade them.)
-detailed statistics of mining percentage and production of buildings (so we can find out things like 5 stone mines for every rock teleporter if you have better pickaxes, but not the AI - assisted mining or any of the bonuses from the mining research center.)
I'm not gonna sugar coat it.