An interesting and quick experience, though very unexplained so I'm still wondering about quite a bit.  Some feedback tho:

• It seems there are goals on each level that you have to hit in terms of gold which are undefined, so I had a few instances where I wasn't quite sure how much more I needed to win.  Adding a clear counter per level would be helpful, it could lead to some interesting planning.
• Each item wasn't too clear on what impact it would end up having on the overall bag, weight and the goal amount.  Though I was able to guess a few, some others just seemed to not impact the bag at all?  So maybe making some clearer distinctions on how much each object does to the bag could be helpful, or maybe adding some sort of "+ _" when you pick up items that shows?  Just to make it clear how much you got and how much bigger the bag got in relation to it.
• The fact that your hand spins depending on movement seems interesting, but unfortunately I was unable to actually utilize it in gameplay.  I thought it might come in handy for trying to move a bigger bag through smaller spaces, but unfortunately I couldn't get it to work.  It seems like an interesting mechanic if you could take advantage of it.  

Overall the basic concept of this game, while unexplained, seems interesting.  I feel like it could lead to a cool puzzle game premise, of trying to find the right route to take while avoiding grabbing too much treasure so you can escape, but just enough to actually make it worth while and to complete the level.  

Nice game...this fits the theme perfectly...the art is also nice