Planet Drop

Planet Drop is a game adaptation of the Japanese Suika (Watermelon) game. Unlike the Suika game (which combines fruit), Planet Drop combines planetary bodies (and the moon). 

When two of the same planetary body touch, they combine into a single, larger, planetary body. There are a total of ten planetary bodies, ranging from Pluto to Jupiter. The player continues to combine the planets and increase their score until any single planet falls out of the container and into the lava.