Thanks Ruby - when I had a couple of friends and family playtesting this I had mixed responses to removing the notches (and later removeing the orbit rings alltogether). I do get that it takes it from being logic based to more random "try every combination", the theory being that players would learn how the planets move and be able to visualise it - however those that didnt like it also got frustrated. Maybe something to be tweaked in the future - but look forward to hearing more opinins on it (or having an option in the settings to keep notch mode on, Thanks for playing! X