Thanks for playing my game and for leaving such detailed feedback, overall I'm glad you enjoyed it despite the bugs.
To start with, the climbing section to the left of the grapple is purely optional and designed to be harder than the main route.
As for the switch, which one was it? If its the one at the very top shortly before the 'cloud boss' that doesn't close anything but rather brings the ceiling down so you can get back up the way you came as you re-join the main route. Again that's part of an optional route you can't normally reach from the main path.
As for the bugs I have released a new version that fixes the following things you mentioned:
-fixed gamepad detection? (sorry cant test this on my end but I think it should work better?)
-fixed crashes after re-entering the room with the 'golem'
-fixed 'cloud boss' softlock. You will need to kill it again but after that it will stay dead and the doors should remain open. Basically it was incorrectly saving its death due to the clones it makes.
-map can now be closed with the dash button/key.
-fixed menus incorrectly using 'gamepad_check' instead of 'gamepad_check_pressed'.
-Upon turning around, the attack animation now stops and all associated direction locks are removed.
Saves should be compatible with the new version, no copying of save files required.
As for the tutorial regarding dash attack, I will take the time to rethink how to better relay this information
