Here's a game I created a while back.  The premise is simple, move the smileys into their same coloured doorways.  Gameplay starts off slow and easy, but gets harder at each level.  See how far you can go without being overwhelmed:

Download The Great Smiley Migration


Instructions:

The leader of the smilies has betrayed his people and sold his loyalty to a chain of discount stores for the simple privilege of playing their mascot in TV commercials.  He's sold the rights to all the smiley ancestral lands for the building of new stores, forcibly evicting smilies of all colours so that they must now frantically search for new homes.

It's up to you to help guide the smilies to their new abodes.  Good Luck!


GAME PLAY:
Smilies will periodically come onto the playing field.  You must select the smiley by using the space bar, then guide him by using the arrow keys.  You cannot reverse the direction that the smiley is going in.  When more than one smiley is in play, use the space bar to switch between them.

Guide the smiley to it's same-coloured doorway.  Don't let it hit the walls or any other smilies.  You get 10 points per smiley brought safely home in round 1, and 5 points are added to that total each round. You lose 5 points (and 1 life) for each smiley that dies.  The amount of points you lose also increases by 5 for each level.

Periodically bonuses like hamburgers and diamonds will show up on the game board.  Guide a smiley to one of these in order to reap their benefits.  A diamond will give you 40 points, and a hamburger will give you 1 extra life.

Smilies will start to come out more frequently for each level as you progress.  The game ends when you finally become overwhelmed and loose all your lives.  The object of the game is to try to rack up as many points as you can before that