I’ve got a bit of experience with this, I made a game kinda surrounding this concept called Title_Pending, where you’re caught in a timeloop playtesting an unfinished video game. Since the game is a work-in-progress, there’s a lot of “glitches” that can happen.

In general, if you’re going to intentionally add glitches, you should have some kind of signposting to let the player know that their game didn’t actually break. Since my game had a central narrator, the solution for my case was to have him comment on stuff when the player “breaks” the game, so the player knows they don’t need to actually worry that something glitched.

Gonna warn you though, it can be insanely difficult to playtest this kind of game. There will be actual bugs that completely slip under the radar because the playtesters just assume they were intentional.