First app published on GP, getting downloads


I published my first app on Google Play around a bit more than 24 hrs, and I’m shocked that it’s not getting downloads…
Does it takes time (days) for new apps to be searchable / indexed by the Play Store ??, what you guys suggest me to do ?, all I can think is try to enhance my app description and/or promote it on forums/social networks/etc…

here is the link to the app:

Also, should I try other stores?, Amazon is the one I heard is second in popularity.