Great game!
Nice setting/world, the music puts you in an "otherworldly" mood, and the puzzles are good and increase in difficulty over time.
If you can come up with one or two other mechanics besides the light beams, this might become a good puzzle adventure in the spirit of the first Tomb Raider (minus the platforming).
Only slight problem is that when you first need to use the "Time bubble" feature on the broken bridge, it's rather hard to actually hit the bridge because it just consists of ropes. I bombared the opposing canyon wall with time bubbles. Since at this point the player doesn't know what to expect from the feature, it's IMO not the best way to introduce that feature.
But again, just a small remark on an otherwise great game. Thanks for making it!