You probably downloaded this game via an ad claiming that you could get free Robux if you play it. Don't waste your time with this, this is a massive scam. Once you're nearing around 10k gems, the game starts to give you .1 and .01 of a gem. And once you finally have 10k, the game just straight-up reduces the amount of gems you have. This was all an elaborate scheme to trick the player into playing forever, chasing the false promise of free Robux. Do not download this, it's a big waste of time.