this is a lot of fun!  what a great concept and really matches the feel of NES games.  
a couple things i noticed that i think could be improved: you don't get time to grab the treasure from the last grave on each level because you're immediately taken to the next level.  i'm pretty sure i had one more grave on the last level, but i won without robbing it.  very minor points though, well done on the game. :) 

Nice game! The HTML version worked fine for me, the art and music were nice too :)

I never thought grave robbing can be so fun. Great idea and it plays good!

For a first game it is great. The art is good and the sounds are good, I found it to be a fun game.

Had a lot of fun digging up graves while avoiding the ghosts, nice idea! And I just love the name of the game haha

Nice! If this is your first game I think you did hell of a good job! Graphics work well, sounds too, and I found no glitches in the "HTML5 thing" :P

On level 3 a few graves were not aligning with the grid properly, but other than that it was great all the way ^^