Light Up 2
Light Up 2 is a physics/puzzle game from the creator of the original Light UP. This chill, relaxing game is all about moving circles around the screen to light up dark orbs, hence the name. You do this by turning neutral orbs into colored orbs that reflect certain types of orbs, creating a little bit of controlled chaos that will (hopefully) settle in to a fully-lit arrangement of circles!
There are initially four kinds of orbs: immovable gray orbs, white orbs you can click to remove, glowing orbs, and dark orbs. Your goal is to get the glowing orb to touch the dark orbs to light them up, a task usually accomplished by removing white orbs and letting gravity do its thing. Objects only have to touch to interact, not stick together, and once you light a darkened orb, it can be used to light other dark orbs, which comes in handy in later levels.
Soon, you gain access to new tools in the form of blue and green bulbs. Blue bulbs reflect glowing bulbs and are created by holding [ctrl] and clicking on white orbs. Green bulbs can be made by holding [shift] and clicking on any white orb. Dark orbs bounce off of green orbs, so use them to move what would usually be the target towards the light. The number of green/blue bulbs you can create is marked in the top left corner of the screen, along with the number of white orbs you can remove.
If it all sounds like a big mess of bulby/orby confusion, believe me when I say it is anything but. Light Up 2 is a relaxing, thoughtful experience filled with soothing sound effects and quiet puzzles. Clicking and creating orbs becomes second nature a few levels in, and determining the right time to change the color of or removing orbs is your key to success. It's never quite as easy as it seems.
There's just one drawback to the whole Light Up 2 experience: unreliable physics. Identical actions rarely produce similar results, so if you turn one orb green something different will happen each time you restart the level. This saps a great deal of the strategy and puzzle elements out of the game, leaving trial and error the only true course to victory. This isn't an unheard of problem in physics puzzle games, but it's a few degrees more severe in Light Up 2. Workaround? Try, try, and try again. Four leaf clovers won't hurt, either.
Despite its technical shortcoming, Light Up 2 is still a worthwhile experience. Its short, 30-level run will take you less than half an hour to complete, with the only real stumbling block being the unreliable physics engine. However, the smooth presentation and calming set-up crafts a lovely mood that's worth checking out.