Stack objects to reach the highest tower.
Grasp people to build a tower from your products.
You can also use several different images which are dropped so your tower can look unique.
To succeed in this game, player has to pay attention to the location of the object. Therefore he is forced to hold your eyes into your product.
To make the game more difficult, the tower beneath will start moving faster, making it harder to drop the object on top of it.
You can take inspiration from a realistic situation. Are your products usually used on some kind of platform, table, stand that you can use as a surface in this game?