I love this game. The short but challenging levels are absolut fun. Personally I liked the ice world most, due to the "speed without jumping" thing. Definitely game of the week to me. I do hope this nice little game won't go by unnoticed. I already gave five stars in the app store, and I too think that the new price fits better and hopefully will help to sell some.
Even though I stuck a little in the lava world I hope that there will be new levels. But since you said you will possibly make some if the game sells good I guess chances are low, aren't they? Anyway, nice little game! Well done mate and good luck!