Amazing visuals and physics. Really phenomenal. The game progression needs some tweaking though. Definitely needs more options for gaining emeralds. Almost every item is just a multiplier so you just buy the next expensive item, there's literally no choices here. If you had items that do different things but with different tiers of power you could price them closer together which gives the player more options for progression.
Also, and this might sound really crazy, but you could make some of the sexy items non money makers. That is, they're purely cosmetic so the player only buys them because they want to see them. This gives the player more things to consider. Do I want to buy this item now for more money later or do I want to buy this cake now because I want my cow girl to have a huge ass?
Choices, choices, choices.