Yeah, a better feedback system for the interactions is something we planned on, but didn't have time to do. Most interactions do have feedback (in the form of either an item appearing or disappearing from the inventory and a small sound), but some interactions (like the bridge) have no feedback at all. And an indicator list for all completed tasks would also help, I don't know why we didn't think of that... (probably the lack of sleep).
Thanks for the comment and the kind words! Our art division pretty much didn't sleep at all for the whole jam to make it look so good!