Really liked this! Fine little set of puzzles, and the fact that the rules are not straight up on our faces makes it more interesting and challenging.
Presentation wise, this is rather simple. The graphics are okay. They're basic, not being too flashy, but they don't have to be. The lack of music did throw me off a bit at first, but I eventually started thinking of this puzzle as some sort of real life trick box, so it stopped bothering me.
In every level, there are buttons and lights to interact with. Sometimes, you have to figure out how the buttons and boxes function, to find out what to do. There are some pretty interesting little systems to figure out here, sometimes you have to hit lights in the right order, sometimes you have to discover how things function in order to get them to do what you want, and sometimes you get a simple visual aid as a clue. Always pretty clever, I liked it.
The hints are cryptic as well, so they don't spoil the fun. All in al, solid puzzler.