OK, so I'm in a bit of a good news/ bad news situation:
Good news! The half of the first level is in a playable state! You can try it here.
Bad news: I just had the first play-test of the game and a few things became clear to me: Navigation is hard(So I quickly threw together a minimap), and that I still overcomplicated the level. The latter is easier to fix, but the first one is kind of a problem. Any help would be appriceated, because I can't seem to find a solution.