Level design and including the player in story was really well thought out.
Reticle feedback of distance or locking on was very nice, although it seems when I hit one of the walls I would just stop until I either pushed out of the way (this could have something to do with the below) or eventually just started phasing through walls (I think I destroyed the wall collisions).
I feel the lining up of shots was a bit difficult, maybe it should have shot towards the enemy when within a certain radius of the reticle?
Some point, I think after the health restored it seems I was impervious to damage.
Ultimately, I do think this is a well made game, well done to you and your team.