If I could give something between "Yes" and "No", that's what I'd give. "Yes" because I can't say the author hasn't put all themselves to realise this puzzle game in so little time: very curated graphics, nice effects, silent narration, and a peculiar mechanic that surely makes it intriguing.
"No" because the puzzle solving itself felt somehow heavy, I wasn't motivated to go on (I've quit at the vertical room where you have to use 3 different blocks to attach the green one onto the ceiling). For instance, last year jam winner "Alter" was a puzzle game where I kind of wanted to know what the AI would have told me next. On this year's entry "Slidespace", I've got the sensation of getting closer to the end because I could literally see it. The story was quite simple (and still silent) but it was there. Here, it looks more like that the author wanted to showcase all the different ideas they had came about (new blocks popping up stage after stage), rather than creating some sort of flow for the player, or some sort of narration. It looks like one of those AAA games with a lot of budget and fancy graphics, but with a low-average quality gameplay-wise.
Voting "No" as I think gameplay should come before graphics