Hi! Thank you for leaving a review, there is a way to progress past the bridge, a valve in the room behind that you need to spin. For now, the game is pretty short (only 4 levels/8 (each having around 2-5 rooms)) and I only uploaded it here so I could get some feedback.
Thank you again for the review and I'll make sure to add a hint for that in the next update!
PS: The only thing that I would like to know is how much time have you spent playing - not the exact number, just an approximate so I know the average length of the game.