I was frustrated and uninstalled in two hours. This game doesn't even hook you in the first few levels, by 4 (not even unlocking all the features yet like inventory) youre already waiting an absurd amount of time to do any merging. No development in the storyline at all to keep interest.I never ran out of energy because I had to wait so long to just get one thing merged to complete a task. Constantly using those first provided gems to speed up the process so I could play for more than 2 minutes.