Alright, so I tried out the bugged version (I see what you mean, the end portal doesn't work) but overall as a concept I think it's really cool. It's a tad confusing at first, but man is it so neat when you figure it out! Really unfortunate that this version ended up being bugged, as not only are the controls rather intuitive (aside from the fact that you need to hold down E to pick up the cube) and the idea amazing, the art is also super well done! 5 stars for creativity for sure, and although there's not really much of a game here, the idea is great for a puzzle game.