I ended after third level, for me it's really unplayable on keyboard (maybe it's diferent on gamepad where you can control your force). Or if you want to keep your sliding you could add walls so you can bounce of them (and make some levels also without wals)
While we appreciate your thoughtful comment, nobody else who's played this game has found it too hard, especially not at level three. As we said before, the sliding is part of the game's difficulty, but there is certainly a learning curve. If you have a big problem with the sliding, either play an easier game, or the easy version thats soon to come.