There's a lot to like here, but I do have one complaint: the fact that there's no indication of which portals connect to which forces a great deal of trial and error on levels which are focused around a large number of portals, which I personally find more frustrating than engaging? I'm currently stuck on one such level (the third-to-last level in world C) and I rather wish I could skip it just because I'm not really enjoying it
Thank you for your feedback. The trial and error approach is part of the game design.You can use the undo button (upper left corner) or the "Z" button on keyboard in order to undo a movement/action.Also using a key from the game menu you can skip a level (unlock the next one), and then you can try to gain the key back later solving the level. We have 5 keys in total.