Thanks for your very kind comments! Yes, your feedback about backtracking is something others have said as well - The reason we put the ‘clear the level’ requirement in was just to force engagement with the enemies and puzzles, so you don’t just run past them, which I think is less of a risk than we thought, but also it makes it easier to design a level like the 7th level which loops back on itself and have a ‘key and lock’ mechanism to proceed - there are other solutions to that problem given more time. I’m not sure if you would have reached it, the penultimate level is very difficult - but there is one boss at the end at least :)