I appreciate your detailed feedback. I was going for a "no text tutorial" with the flashing squares, but that seems to be a hit or miss for some people so I created some gifs in the description.
The sequence positioning seems to be an interesting phenomenon. The original mechanics were that spawning gloops would make progress on the first beat, but this was confusing to my sole playtester that didn't develop the game, so I changed it to her mental model thinking that she was less biased. But literally every other player afterwards has complained about that haha. I agree overall though that it needs more consistency. Thanks again for playing