I didn't give much though when going through the level. I just went right until I hit a block that I couldn't pass and just tried avoiding it by going up or down. I do not understand what the different block effects do in-game. I could read the description but to me a good game is easy to pick-up without having to read a tutorial or a play-through outside of the game. Think about fighting games. You can just start playing and all you have to do is learn the moves and timing.
Try to work on conveying the mechanics one block at a time. Also, try adding some penalties to certain paths so that the player will try to avoid them.
Otherwise, good idea for a game. I liked it.