OK, this is the big one. We still keep using `#include` guards only
where we absolutely need to, but with each header now being valid in
isolation, this can now actually help *minimize* the length of each
translation unit's `#include` list. Turns out that after removing all
the duplicates, we only *actually* need to guard 29 headers across all
5 games.
Part of P0285, funded by [Anonymous] and iruleatgames.
Slow Mode only does one thing: It looks at how many 8×8 pellets or
16×16 bullets are alive, and reduces the frame rate by 33% (i.e., turns
every second frame into two frames) if that number is…
Part of P0151, funded by Blue Bolt and -Tom-.
nmlgc