Gimme Friction Baby

The worryingly titled Gimme Friction Baby is actually a clever game which balances strategy and skill with a very simple mechanism. The aim is to burst as many bubbles as possible, by decreasing the number on them from three to zero. Balls will bounce around and get gradually slower and slower (possibly the friction referenced by the title), before coming to a halt and expanding until they hit something. If a ball bounces back across the baseline then the game is over, and your score is the number of balls burst.
When I started playing I was stuck with a high score of six for quite a while, before fluking my current high score of twenty six. This does seem like the sort of game where it would be possible to score indefinitely if you got good at it, but it's quite entertaining while you're capable of making mistakes.

Sky Blocs

Sky Blocs is a puzzle game which borrows strongly from the 1992 game Pushover. The aim is to knock over all the dominoes and then to hit the flag box and raise the victory flag. As the levels progress more and more objects become available for you to use, which in turn enables more and more improbable domino set-ups!

Agent Scappa pointed out the original Pushover game to me, and I think this is just as tricky (but with a lot better graphics).

Five Differences

Simply a game of spot the difference, but with five differences to find on a whole host of charming, lifelike scenes. This game feels very tranquil, and slightly weird, although I did have to resort to clicking randomly to finish some of the levels.

 

Grow Island

Grow Island is made by the creator of the other Grow games and is still based on the 'find the correct order' principle.
This particular game doubles as an advert for an institute of education in Japan I think, but I didn't read carefully enough to find out.
Although I haven't finished this yet I hear that Naomi has, so many congratulations to her.
 

Portal (Flash version)

Quite a complicated game based on quite a simple idea. You have a gun which fires 'portals' - a yellow one and a blue one. The two portals link to each other - anything that goes in one will come out of the other. Then you throw this portal gun into a game where the aim is to get from the start to the finish of each level, and that's it!
There are hints at the top of each level, telling you how to play, and you should remember things like the speed you go into a portal is the same as the speed you come out of the other end. You can only fire the portals on the white walls, and later on you'll come across lasers, cubes and turrets, which make things even more complicated.
The game is based on a game currently on sale called Portal.

Factory Balls

In Factory Balls you work in a ball factory, creating balls to particular specifications. Drag and drop the balls onto the various tools to create a ball that looks like the stick on each box. It is possible to lose all your balls, before you complete the game, so try to avoid that. For levels where you need to combine paint together you may need to think about how computer printers combine their ink to make colours.
 

The short term memory checker

Try to remember a set of random objects. How many can you remember at once? Beware - many of the objects are similar to other objects.

It seems like my limit is about 11 objects.