Cool game!
The perspective of the gate and whether or not people were through it was quite hard to see, maybe you could add a line on the ground to signify where the gate actually hits. Another way to do this might be to change the ground type (to stone, for instance) where the gate hits. That way, when a person is on/over that line, you know you can re-activate the lasers.
Another small QoL improvement the ability to skip the tutorials/fast forward through them. Maybe also add some subtitles.
Other than that, I had a blast! Well done!