A straightforward and easy to understand game! the controls are simple. the idea of switching between characters is reminiscence of fire boy & water girl, which is a very interesting concept.
One thing is that I'm unable to tell which character I'm currently in control of as there is no indication unless you move or have been keeping track. not a big issue though, could be considered as part of the challenging aspect of the game.
Very addicting, I could probably play 50+ levels of this. well done !