Okay thanks I think I will just go with a flat SM3.0 requirement and compiler then.

Regarding the difficulty: I really like difficult games and I think modern games are way too easy. The market is flooded with easy and casual and puzzle based platformers, so that's why my game is nothing like that, too. I have only two levels with checkpoints and those are long levels. Most of the other maps can be completed in 90 seconds when you speedrun them which is a little too short for checkpoints. Trying to make a level longer is surprisingly hard because you have to come up with new platform patterns and obstacles all the time so I've decided to keep them rather short and without checkpoints.
Btw. high difficulty does not mean a frustrating experience, actually it can be more satisfying this way to complete a level. Although I make the levels pretty hard I always try to keep them fair which means that the player is always able to see what is about to kill him.