No you weren't harsh in any way whatsoever. It hurt to read (because unless I'm drastically different from most poeple, most people would feel bad that something they made wasn't great) but I am being genuine when I say thank you for being honest, and I can tell you tried to soften the blow. You did nothing wrong, and no apology was necessary. I promise. Your comment was incredibly helpful, or at least, more helpful (though not quite as funny, but also just as valid) as the other feedback I had which read "M a a a a a a a a a a a a a a t h" (a very valid statement which conveys that they found the math annoying, I just wish they'd added a bit more to it so I could figure out if I could salvage this game).
Your comment was a) informative in pointing out the problems, while also giving me an idea of what was done well, and b) was clearly well thought out. You did nothing wrong. My first comment wasn't sarcastic or anything like that, and I started to explain where the cycle was because in situations like this, my impulse is to take feedback like that as confusion that requires an explanation, and it usually takes me a minute to understand it's meant not as confusion but as feedback.