Rhythm is more or less, okay; ‘minecraft Steve’ being repeated twice is sounding a wee bit off, but I think that’s just me. Maybe something like ‘builder Steve’ repeated twice sounds better? ( I know it will not suit the minecraft theme, but just giving an example.)
I like the ending twist you gave, by directing an insult to the reader; gives it a slight humorous tinge. I’m not that much of a player of minecraft, but I think that mostly all the trees there are just pixel and there’s very little difference right? If so, then fact that you gave those pixel trees names, is creative and makes the poem more realistic, despite being based on a game.
Is this ‘minecraft Steve’ some youtuber who plays minecraft? If that’s true, then the poem does have a more proper meaning to it.
‘Building a cool house, that’ sounds a bit too simple-ish. You could’ve added something else, like
‘Building a house that is,
Metaphorically, (I went with ‘me-ta-pho-ri-ca-lly’)
As cool as ice, and is,
Cooler than you!’
This way, the poem can express the same fact you mentioned, but in a slightly more unusual way. What I’m trying to say is, try and use such ‘twist and turns’ to add more flair to the poem, so that it could add an extra creative touch.
Gower, covered the part of syllables, and I would just like to add that expressing stressed and unstressed is totally based on pronunciation. If I ever have a doubt, what I usually do is google the word and use the google voice so that the word is pronounced properly. Try doing that next time, in case you’re not sure about the syllables.
Overall, the poem was nice, and the context was creative. 4 points.