Cool puzzles but I almost gave up on that frustrating lvl 4. I even did not figure out how to get stars.
Also, I think sometimes I got more moves than expected. I was running toward a "battery charger" and I saw I had 00 move left but then it shows 02 and I was still able to charge my little crab. Not sure how it happened though (all I did was rushing toward the battery, moving slowing's not working).
The last level was a bit easier, so now I can resume rating other games xD.