The base idea is may be simple, but you did a great job introducing variations to keep it fresh. The theme is very well used as part of the core mechanics of the game, and it is often needed. I'm also a fan of this kind of random generation, even though it can be a bit frustrating a times. I feel like the game gets a bit too erratic at the hardest levels, and it's really hard to keep track of everything. Did you beat it yourself?
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Yeah, I did beat it myself and I had some people in my discord server playtest it as well, they said it was hard but doable. It was much harder before, and I did have to nerf it a few times. It's quite hard to get it right, but I think overall I did a great job at it.
Also, I know it can be a bit frustrating but I think it's also part of the charm, trying to "outsmart" the noise. There's some patterns that you end up catching after a bit of playtime, but they're not trivial at all.
Thanks a lot for playing, and thanks for the feedback!