build a free download game application

This game I would like to design would be called "whack a doozy". It would consist of a person (funny character) holding a soft mallet, whacking another character ( funny looking character), as it pops up from the ground (or another object. Open to suggestions). Have multiple levels. Begin with one character popping up, 4 characters popping up, 2 characters poppy up, 1 character popping up, etc etc. the better you do, the faster the characters pop up in all different sequence. I figure a total amount of creatures to whack at once would be 6. Again the better you do the faster they come up. The creatures need to come up in a different order so the person in control of whacking a doozy canny figure out the combination of when the creature pops up. Also each time a creature is whacked, it does need to fall back down into the object it came up from. I will want this application to be able to run with apple, android software.