I usually tend to do the same for the interact button. As a matter of fact, I did it on my own game. But I think here, the problem is you need to interact while keep moving, cause sometimes the urns keep rolling. If you stop moving and interact, it works just fine.
And talking about the moving urns... I add a suggestion if you plan to update the game. Maybe highlight the object that 6702 will interact with. So if a bone or a tomb is highlighted, you keep trying to interact with the urn instead. You keep the chaos concept , but make it easier to know what you will grab. Just an idea ;)