The controls on this one feel really clunky, but the resource management puzzle works pretty well. I feel that the concept of darkened areas could have been expanded on more, but I'm not really sure how I would've done that. As it is, the game feels simple enough that I wasn't really compelled to try again after dying a couple times, but I think the underlying ideas form a decent core, they just needed to be fleshed out a little more.
I recommend considering the principle of risk-and-reward deeply. As it is, the most rewarding places are also the safest, because you can see what's going on, so there's little encouragement to venture into the unknown.