Thanks for your input. Funnily enough some friends of mine also noted these issues and I only fixed them for the Linux version as I clearly had only minor problems with them, but you are right. Even with minor problems I already should have addressed them.
This is why I re-uploaded the Windows version with the fixed problems. Thanks for that additional input.
One reason I decided to let the player do a full circle is, partially, to fit more with the theme "Cycles". ^^ But another reason is to ensure, even after the first level, that the player knows that he only can walk in one direction.
Secondly, the player has to be aware of his actions, even if can approach them again from the same angle. Next, perspective can change as the view changes. Especially in later levels where more space is used for problem solving.
Lastly, I thought it would be good to have a "speed" button, but ultimately decided against it as it would undermine the theme of time being a constant (under equal circumstances).