Hi, thanks for the feedback. Jumping is just an animation and has no use in-game. Unfortunately, we had a very limited amount of time to make everything for the game jam so we decided not to fix the animation.
To pass the first door, you have to step on the pressure plate (it is darker than the others).
You can change the mouse sensitivity, the player speed and the volume by pressing ESC and clicking Options.
You can pick up the “data sticks” (i.e. the light blue and orange devices) that you find around.
Please let us know if this piece of additional information helped you leave the first area.
Thanks again for the feedback :)