This game sadly goes from "amazing" to "Pay for it or wait 9 years for ads to finish" after clearing only the first dungeon. If you are masochistic enough to suffer through about 25 to 30 ads just to progress to the second dungeon and another ad for every run you do (not to mention the second time you need to unlock the third dungeon), this is probably quite fun. As it stands, however, this is a terribly toxic marketing strategy. Sad, since the gameplay is actually quite decent.