I like games like this, but it should get harder as you go on, not easier. Also the level with the house I clicked on the last difference (I won't say where it was as that would spoil the fun) and it didn't find it, so I figured there was another difference. I came back to it like 5 minutes later and voila' it accepted it. And the levels that move when you move your mouse were extremely annoying. Overall 4/5
 "Wake the Royalty"){kind=icon}
 "Infectonator : World Dominator"){kind=icon}
 "Elona Shooter"){kind=icon}
 "Factory Balls 3"){kind=icon}
 "Balloon in a Wasteland"){kind=icon}
 "Effing Hail"){kind=icon}
 "MegaDrill"){kind=icon}
 "4 Differences"){kind=icon}