I did see the subliminal messages but I wasn't able to read anything in the short amount of time they were visible for. How many ticks is it on-screen for?
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3/5/9/12 ticks, depending on which message it is. Definitely “quick” bordering on (as intended) “did I actually see something there?”
I wonder if it’s worth implementing a multiplier on replay… “this player never appears to’ve ‘participated,’ so let’s multiply all of the ‘glitch’ ticks by two.” That would make it pretty obvious that something’s happening (and make it easier to read the first time you see it).
That might help. For sure, people will have different experiences depending on their age, computer performance and monitor refresh rates. Adding a multiplier that's based on previous plays is a little outside the scope of the jam but if it fixes an issue that's preventing people from playing the game, have at it.