Yeah there's a bug, you get the shield instead of the grappling hook ... So you miss half of the game.
There's a link to a version with a bug correction in the description of page.
Anyway, thank for your comment :)
Viewing post in The Four Eyed Creature jam comments
I played it again. The bug is a pity, cause the really good parts come after it. I'll adjust my rating accordingly. I'd recommend posting the link on the project page here in the comments. I try to play and rate as many games as possible, so I don't look at the game page of every one. Maybe that's true for other people too. Great entry!