For all you jerks that want to complain, you should be thankful that the dev let you play these two levels for free. It would have probably been just as easy, if not easier, to not offer one and not let you try out his game at all. Aside from that, I'll be buying the full version when I have the money to, since I'm a dev still in debt. :]
Getting trapped with no way out really kills the desire to play this game for me. I love the actual gameplay, but when I can't finish a level after I beat a boss because I get trapped by a wall . . . that's just not cool.