okay i suppose
it captured my interest for 5-10 levels, but after that the slow movement of the cloud got to me and i stopped. Although i like the concept it wasn't very well excecuted.
It's a good foundation for a game, just needs a few things to keep it interesting like upgrades to speed or size of clouds (or maybe even colour, white is so boring). And optional bonus clouds would be nice too for us who like a bit of optional extra challenge.