Makon Soft (more commonly known as Yong Yong) is a Chinese bootleg game developer founded in 1997. They are known for creating several bootleg games for the Game Boy and Game Boy Color. In 2011, they made Android games, but all of them were since delisted and cannot be found on Google Play anymore.
Most of their games have titles that might wonder people of they are the sequel to a different game that doesn't exist, for example: Super Mario Special 3, despite there's no Super Mario Special 2.
Despite some of their games are made for the Game Boy Color, they have random colors, making the graphics in their games look ugly.
Their games have horrible gameplay full of unexpected glitches and extremely slippery controls.
As mentioned above, their games have extremely slippery controls that generally don't even work passably.
The music in their games is terrible and loud, as in Sonic Adventure 7, which in case is known more in the territory of bootleg games for the loud, repetitive and mediocre music.
Some of their games don't even have physics that were in the actual games. For example Sonic 3D Blast 5 and Sonic Adventure 7 have spin dash, but in the game, you can't kill enemies using it, only by jumping on them.
Most of their games have sections that can make the level impossible to complete without cheating.
Their games have many bugs and glitches, like passing through objects or enemies in Super Mario Special 3, as they were poorly programmed.
Some of their games have levels that can't be completed. For example, in Super Mario Special 3, there's a super leaf in the end of Level 4 instead of a Mushroom, meaning if you get the super leaf in the end of Level 4, the level doesn't complete.
Some of their games have horrible level design, like in Sonic 3D Blast 5 and Sonic Adventure 7. Super Mario Special 3 might have three levels taken from original Super Mario Bros. 3 (as Super Mario Special 3 is a "port" of SMB3), they are a bit longer, but the longer parts are also horrible and poor.