This game seems unfinished, which is a shame, because I like the Gameplay.
My first problem was trying to use a gamepad on Linux. The form changing input was broken, so I had to switch to using the Windows version through Wine.
The second problem was that I softlocked myself by wasting my only key on the wrong path. This shouldn't be possible in a Metroidvania. There should always be another key. I was forced to edit the savegame, which luckily was trivial.
The third problem were the dead ends. I ran into two of those, both in the cave system, which was the first area that just felt broken and unfinished. By "dead ends" I mean invisible walls at places where you expect a screen transition or a reward.
The first of those was at a place that was hard to get to and even had a save point. The second dead end came after a miniboss and a platforming challenge. That's when I decided that this game was too unfinished to continue playing.
I really hope this game gets finished.
The first "dead end" does lead to an area, but it's for the pacifist route. When you qualify for it, phoenixes appear in the path to it, both drawing attention to it and refilling your stamina so that you can get there easily. I'm not sure it would be practical to make that crossing impossible otherwise considering how efficient spider form can be, but they probably should have put a gate the old woman could open so that it would be obvious why you can't continue, and definitely should not have put the save point somewhere a murderer can reach.
I have no clue what the deal with the second dead end is. I have been there in a variety of circumstances and never found anything there.
I agree that the softlocks are a major issue, and they make it impossible for me to recommend the game to other people despite how much fun I've had when the game works.