Get20 is a popular free puzzle game app for Android smartphones. Developed by Fun Cool Ventures Inc., this game is a sequel to the highly acclaimed 10をつくりなはれ, with a new challenge to reach level 20. With over 800,000 downloads in total, this game has gained a lot of attention since its release in December 2017.

The objective of Get20 is to combine adjacent numbers to create a sum of 20. Players start by merging 1's to form 2's, then combine 2's to make 3's, and so on, until they reach the elusive 20. The chances of successfully reaching level 20 are incredibly slim, with a success rate of around 1 in 1000.

The gameplay mechanics remain the same as its predecessor, but with a higher difficulty level. Many users who have played 10をつくりなはれ and successfully completed it expressed their desire for a more challenging version, which led to the development and release of Get20.

If you manage to reach level 20, feel free to share your achievement in the game's community forum. The developer has promised to release a version with levels up to 30 if enough players are able to conquer the current challenge.

Overall, Get20 is an engaging and challenging puzzle game that will test your problem-solving skills. Download it now and see if you have what it takes to reach level 20!