Ugh...

Hmm, there seem to be a lot of bugs. I couldn't return to the home screen from the merge screen (fixed on the 3rd launch?), sometimes I couldn't press the 'complete' button even when it showed up, and I'm not sure if I'm even able to spin the gacha. Also, I could watch ads even when it said 0 ads available. The merging itself is enjoyable enough. Ads are optional, but you get more benefits by watching them.