I've seen a few scaling based puzzle games but this is executes it really well. LMB to grow and RMB o shrink via a gun is very intuitive. Reminds me of The Entropy Center(which also had growing cube puzzles)
I will say that throwing is a bit inconsistent. The object placement rotation was also hard to work around. For the latter, you could allow the player to rotate a grabbed objected with mouse scroll.
The graphics are very polished. The VFX is pretty cool as well. As a suggestion, I think you can make the rescale power slider diegetic UI on the gun like dead space. It would increase immersion.
Overall a great entry.