All that is already on the to-do list! Thanks for your feedback still, it really helps us.
The main reason for all these issues is very simple: Time (as usual). We literally submitted the game 5 seconds before the countdown ended. I don't think my heartrate was this high in a long time. We obviously regret not finishing earlier, but it wasn't really possible for us, considering the other work we still had over the weekend and start of the week.
But: We made a game! And that's what really counts for us. We're really proud of the game, and we really like the concept, even if the implementaion isn't flawless.