Thanks mate, appreciate the feedback! :)
That is actually a good suggestion, we didn't want any UI to break the immersion so that is why the detection was hard to come up with. We have a sound hint when enemy detects you, and you have time to run away but I think it is too quiet right now.
Maybe you were just good ;) Balance was hard to find, since bigger detection range would have meant more running away and running into other enemies :D Yeah I actually watched that, it was so good!
Yeah we thought about checkpoints/saving, but in the end thought that checkpoints in-between levels is enough, but I understand it can be frustrating for example level 2 making it into the mansion and dying there multiple times.