Way back before the modern age (like the 1980s), cheap handheld games were all the rage. Many of these were poor knock-offs of popular arcade games such as Ms. Pacman and Galaga. Others were completely original, such as the bizarre Naughty Squirrel game in the picture above.
Check out John Sadowski's site for a list of other strange handheld games.
i wonder what the goal in "naughty squirrel" is... steal the most acorns?