"There is an ongoing theme these days to use a very basic video game shell and hang a 'power-up carrot' in front of the player. The player sees this carrot, and wants it! All the player needs to do is a few very rudimentary repetitious actions to attain it," he said in a blog post.
"Once they get to it, another drops down and asks them to do more… but then the catch… instead of achieving these 'goals' by running on the treadmill, you can instead just pay a single dollar and you instantly get to your goal! Better yet pay ten and unlock all your goals without even having to ever play the game."
McMillen went on to say that this approach is a "slap in the face to actual game design", and vowed that the upcoming mobile edition of Super Meat Boy will not adopt this business model.
He added: "Words can not express how f*****g wrong and horrible this is, for games, for gamers and for the platform as a whole… this business tactic is a slap in the face to actual game design and embodies everything that is wrong with the mobile/casual video game scene."