I think it's a very cool concept and it looks great but as soon as I loaded up the game I noticed how incredibly high my mouse sensitivity got, like super high. Luckily I can change my sensitivity on my mouse so no biggie.
Then I noticed that there's no pause screen, or main menu, or any screen. That could be useful for options like mouse sensitivity and controls and such.
Then when I started playing the game I couldn't really understand the gravity. I pressed Q and it switched, but then I pressed Q like 10 more times and nothing happened, then after pressing a bunch of times it finally switched again, but there's no way to make the gravity go back to normal, so you have to walk around as if you're walking up a river (slow).
Then when I grabbed the objects with E, if it was a big cube then the cube would take up my whole screen so I couldn't even see where I was going with it.
Sorry for the wall of text but I wanted to give you as much feedback as possible!
As I said, really cool unique idea and if you could fix those things I mentioned it would be perfect!