A while ago I stumbled upon a game called Grow, where you drag some strange objects onto a globe and watch them change. Grow is one of several games on a website called eyezmaze. Eyemaze is a site featuring the flash games of a Japanese guy who obviously has a vivid imagination.
http://www.eyezmaze.com
I showed this site to Dani, and she found a game on there called Tontie. Tontie is a whack-a-mole type game that becomes quite challenging. There are 9 squares in which different characters or objects pop up. You use the number pad on your keyboard to make the hammer whack the corresponding square. The basic enemy is a one-eyed character with a spike on it's head, which I'm assuming is called a Tontie. When you hit these guys, the platform it's standing on lowers. Sometimes you get coins or hearts when you hit them. If you miss a Tontie, you lose some life. To pass a level you must stay alive until the timer runs out and all the Tonties are gone.
Each level introduces a new thing to contend with, and the platforms come up faster. Sometimes a store pops up where you can buy stuff with your coins. You start with a red pikopiko hammer, which you can upgrade to a bronze, silver, or gold hammer.
On level 10 there is a boss character you must destroy to pass the level. At first Dani and I could not beat this guy, but now it seems easy. But Dani is the true Tontie master. She plays Tontie every day when she wakes up, and gets to level 20 every day. Level 20 is incredibly difficult. One day, when I was asleep, Dani beat level 20, which is the end. She woke me up and told me about it. The trick is to get to level 20 without using any continues, then the last boss starts with greatly reduced life.
I thought maybe Dani would stop playing Tontie if she beat it, but she is still playing. It's funny hearing the silly theme song and sound effects every day.
If you'd like to play a silly but challenging game, check out Tontie at the eyezmaze website.
http://www.eyezmaze.com