I am at 65 speed and almost finished Geeky, final 4 days left. After that I will get 8x speed and should be able to progress few more levels in other girls, plus 50% increase is already ready for reset. The bad thing is not the time to progress to the next level (this is solved by having patience), it is the thing that there is nothing to do while you progress there (so there is no reason to even run the game between certain checkpoints and on those checkpoints you just start the game, do one action and close it again).