I do have to say that the Android version is nice but hard most because bullet speed on fast mode makes it impossible to hit the enemies and in the beginning the game you almost always get hit at least one from my playing because of how slow and how much it misses the enemies during the first wave and the upgrade on the Android version seem harder in a way but still a great little game I haven't play the Windows version but I would assume that it might be a little easier but I wouldn't know or it might be the same
