2/5 - The second one is one of my favorite games on this site. After playing that one first, this one is no contest. It just seems like too big of a step backwards for it to really be enjoyable.
It's not really all that difficult once you understand the concept. I enjoyed it. I would agree though, instructions on the first level would help understand the concept, it took me to the third level to understand the colors meaning something.
Great game! The first few levels were difficult, but once you figure out the right way to power up and level up, then it really gets interesting. I've been enjoying it!