This game could have been a lot better, but as it stands, it was mostly a drag.
The sensitivity is a bit high, and though I was able to get used to it, an options slider for it would have been nice.
Using WASD to move around while holding down E to carry a block was very inconvenient and made dealing with the enemy...not enjoyable. It would have been a lot better to only need to click E once to pick up an item, then either E again to drop it gently or F to throw it. Maybe I wasn't far away enough, but even when I managed to throw the block in the direction of the enemy, it seemed to just bounce off and I couldn't tell if I had dealt damage. I ended up accidentally glitching the enemy by holding a block while it approached me; it just disappeared when I did that, so I moved on.
I also didn't like the implementation stacking blocks mechanic. It was way too easy to knock things over and only enjoyable to stack things maybe 2-3 blocks high because of that, and it began to get annoying rather than challenging. In the process of attempting to make small adjustment to my staircase, I ended up accidentally finding another glitch where I could basically fly by holding a block underneath me while next to a wall and jumping. I felt bad, but the prospect of putting together a 6 block high staircase felt like tedium, so I used the glitch instead, and it felt much more fun this way.
I think the tall staircases would have been acceptable if controlling the blocks was easier. Currently, it's easy to rotate them accidentally and difficult to rotate them on purpose, so it's annoying to position them precisely. Maybe the experience would be nicer if they were to somehow snap into place (Minecraft 1 block at a time April Fools Update style?) or not rotate at all?
My least favorite part of the experience was probably the invisible voice. It was just...grating in the wrong ways and irritating to listen to. I understand that it's supposed to be condescending and above you, but potentially due to the fact that it's AI generated, it's just...not enjoyable. Even before I realized it sounds like AI.
I did like the drawn control instructions on the wall and built in tutorial though, they add an integrated way to make sure you learn to play. I always like environmental tutorials like this.