Challenging puzzle game that gets exponentially tougher as you progress!
TenOperations Software
https://724fun.com/
https://glowpuzzle.co
http://www.thebestofflash.com/
BridgesDev
https://yesthisgame.com
https://web2.mrexcessive.net
https://littlegustv.github.io/
http://thebytechallenge.ebhasin.com/