This could be a fun game, but the accrued energy does not really match up to the tasks. You can accrue up to 60 points of energy in about an hour or so, but some of the tasks take as much as 500 points of energy. Sorry, but I just don't see the point of pounding on a rock for 5 seconds, then having to come back in an hour and pound the same rock again for 5 seconds of game time. Moves way too slow for me.