I didn't find it too difficult personally; I was able to perfect them each time without much, if any, trouble. The hardest part is probably the last one where the green bubble speeds across while bouncing, but that was still fairly easy as someone with no accessibility needs. Not sure if that's the same one or if it's the whole experience that's rough for you, but thought I'd offer my two cents as someone with a different perspective.
For 0.6.8, it's a SFW main story quest. So just pass the days in-game and you'll eventually reach it (I'm assuming the cafe has to be in the positive money and rep wise, can't say for certain). Barely a spoiler and more of a hint for what it is to see if it's in your gallery, but: