I don't know if this helps, because it may only be true of my experience!, but I think the first moment of confusion was that I had no reason to believe a box would "teleport" with me if I died. I assumed it would just land on the spikes if I died, so my natural instinct was to drop the box on the spikes to protect myself.
Thanks for sharing your experience and toughts with me!! (^u^) Ye, your're right i should had made more clear that you can transport the box with you when you die/win. I'm sure that your're not the only one that had this tought
PS. Sorry if i still haven't playied your game, i had a very busy day today :P