Thank you everybody for the heartwarming feedback, it really means a lot.
I know the last level may seem impossible and like a softlock, but it isn't. You have to literally think outside of the box to solve it.
For everyone having trouble with the Levels not starting: You END and START every level by pressing space. You're given some time to assess the situation and position yourself. In the future info cards will appear at the start of the level to introduce new elements, that's why the game waits for you to confirm.