There was a bug where i kill the last enemy on the edge of the map, then enemy don't die but become invincible instead. So I have to complete it again.
I agree that idle games shouldn't have endurance badges, because it's hard to measure, having an impossible badge that requires 30 days of playtime is grindy as hell for those who don't like this game, while it's too short for us which seem not deserve to be an impossible badge(not even level 9000). Putting only an easy badge is a deliberate move by tukkun which is enough to attract new players. Also, putting an impossible badge may cause this game further voted down by those who don't want to play for a long time.