Really clever and pretty presentation!
Reminds of of Antichamber and Portal, I think you've integrated the theme nicely and I enjoyed every second of gameplay! The homing missiles are a perfect fit.
I would have loved a visual and auditory cue when pressing and holding left click to charge up a farther throw, took me a bit to figure out I could do that. The audio levels overall are quite low, but one can always turn up the volume. :)