Guys I have worked with Game Maker 8 and Game Maker Studio. Believe me its the easiest thing. It haves no influence of OOPS and moreover I learnt it when I was in 5th standard. Why learn it? Because it is easy and multiplatform. It haves options to export for PS4 and even XBox-One, more platforms are android, Windows 8 Store, Facebook, Tizen, Android etc.......
The mechanism of working can be identified by any novice user also. All you need to know is Graph Stuff from Maths Class.