Thank you for your comment!
Normally the shield should block the laser, maybe you had a bug, I'll check that.
For the player jump,I hesitated to remove it at some point, but I think it was better to have this mechanic as it allows some freedom.
In the part with the interruptor behind the glass, you have to shoot your shield and then shoot a red projectile on it to make it bounce and go to the interruptor. But I agree that it is hard to understand.
Thanks again for all this feedbacks. :)