This game is very bad at being a puzzle game. I bought it because it was categorized as a puzzle game, and now it's tagged as a puzzle game, but don't trust that.
If you like brain teasers, really stay away from this. The game has a good presentation, but is overall frustrating. It doesn't require thinking to get by and many of its mechanics go against puzzle game fundamentals. For example:
There is a flawed gold/silver/bronze medal system for finishing levels with certain ammounts of energy remaining. Which gives the impression there is an optimal way to solve levels until LATER in the game you gain the ability to RECOVER energy and you can use that ability in levels BEFORE gaining that ability!
You can die, and you will, a lot, if you touch the creeps in stage, but then you respawn. You also gain the ability to kill them, but they also respawn. This is like an arcade game that doesn't work.
One of the "puzzle" features is that the pieces you have to rotate appear for 2 seconds on the screen then become "?" symbols until you pass energy through them. You can rotate the "?" symbols. Just so you know, it's 100% not possible to beat a level of this kind and get a gold medal without memorizing what you should rotate first, after a lot of restarts.
Not a good puzzle game. Flawed mechanics. Frustrating. Would not recommend. If you want a connect the paths game, get Droplitz, it's a casual puzzle like Tetris and at not in the least frustrating.