The site App-reciation Reviews just posted a very nice review of SpongeDude and the Alien Hippies. The only thing they suggested was to add some more tips and hints to help players with the more complex levels. So please, if you played SpogneDude, give us some feedback which levels were exceptional hard and need more hints - we will consider this for the next update.
P.S.: Also check out some of the initial concept art for SpongeDude from our friends at mainfeld.com.