Bubble Drop is an addictive puzzle game which follows a format you'll be well used to by now. Different coloured bubbles drop down the screen; match them up and watch them explode. If you can eliminate all the bubbles then very well done.
If you're not such a natural you can save and resume games throughout the day. The graphics might not be so slick, it literally is just a screen of brightly-coloured circles, but ask Mr Tetris how important that is. The gameplay is very good and once the microchip has learned your moves you'll be in for some serious fun.