Thanks! Glad you enjoyed :)
Indeed it's inverted in a way that losing in a 2x2 is easier than in a 4x4 - that's why I introduced the endgame feature, where getting a full board is the loss condition. I believe that at this point the difficulty is the highest.
Also, since 2x2 is just for the first couple of moves I figured that it would (kindly) force players to adjust to a strategic play style from the get to, and if they're unlucky - there's a quick restart, when there's barely any progress made, so no harm.
But I do agree it could've been a smoother curve. Thanks again for your input!