I think the highlight of the game was definitely the sprite-work for all the dinosaur combinations you could bring about! The digging game reminded me of the one from the old Pokemon games, with multiple tools, and gems showing up along side the fossils. I think it would be good to implement a sort of taxes or goal amount of money you're trying to work up to, also maybe an audio cue when you finish cleaning a fossil! But for what it is a very good game.