I like the atmosphere a lot, the "spacehelmet breathing" sound does the heavy lifting there. The concept of the void that van be "cut open" with light beacons is fun, but the game mechanics were a bit confusing (and I couldn't read all the hints quickly enough) so I got confused and ran out of lights to place.
I would suggest a bit more handholding in the tutorial part and maybe some obstacles/powerups to flsh out the gameplay more, but there's a cool concept here waiting to be fleshed out further.