Try giving logical reasons for remarks. Such as "This section is too hard because that one platform is too high up" "That's pretty clever to put that item there, because it gives you a second chance should you fall down", or even "Holy crap, someone remembered that some people still play as Jazz!

And if course, if something is your opinion, be sure to not state it as a definite fact: " This is too enclosed. 0/10" vs "I'm not a fan of how enclosed this is."