I'm simply warning the author that it's a bad idea to commit to so many games at once. Over-ambition and poor management almost always ends in frustration and abandonment. I like these games and I want them to succeed, but I refuse to get emotionally invested into a game that is being sabotaged by poor decision-making. Been burned too times over this.
Free products aren't exempt of opinions and criticism. Criticism can help you grow and learn as a developer, and if you intend on publishing your game down the line you need to strike a balance between your creative vision and something people are interested in playing / buying.
The "polite" culture has become a trap. It has made people afraid of being honest because they don't want to hurt others' feelings, or because they don't deal with the backlash that comes with writing any form of criticism. Imagine putting all your effort into something and failing... because no one told you your product was bad, broken, uninteresting, or going down a bad path, out of fear it would hurt your feelings.
I hate the mentality that only praise is allowed, or that any form of negativity has to be extremely gentle because the dev is "fragile".
Not everyone is going to be well-spoken or polite when they write their feedback, but just because they weren't "eloquent" enough for your taste doesn't mean you should automatically dismiss them. Focus on the meaning of the message, not how it was conveyed.