click the geometry dash icon to get more money and open the shop to see what you cane buy. If you click on the thing in the shop you want to buy and it turns red that means you don't have enough money, if it turns green that means you bought it. There are 3 items in the shop, red cursor 100$, green cursor 200$, and change score by 100 300$.
I watched a tutorial on youtube for this, but I added the shop and every thing in the shop. The scratcher that I watched @shiftclicklearn