PopStellar is a free puzzle game developed by Mansoon Software for Android devices. The game's objective is to tap two or more blocks of the same color to earn points and progress to the next level. There is no time limit, but each stage has a target point that the player must achieve to move on to the next level.

The game has a simple and intuitive interface, making it easy to play for users of all ages. PopStellar also offers cryptocurrency rewards, allowing players to earn up to 1 XLM (Stellar Lumens) every 3 days. To claim the rewards, players need to tap the wallet button on the home screen and register their Coinbase or Binance account email. After claiming the rewards, players can convert their XLM to BTC (Bitcoin), ETH (Ethereum), or other cryptocurrencies.

Overall, PopStellar is a fun and addictive puzzle game that offers a unique feature of cryptocurrency rewards. The game's simple gameplay and colorful graphics make it an enjoyable experience for players who are looking for a casual game to pass the time.