Ok, so I think for quick and fun side project, I'm pretty pleased with these numbers!
Unfortunately, I don't have time to generate more content for users, and there are only 4 purchasable packs in the game, so users won't buy any more things until I bring more content.
We also stoped doing ads because we didn't have enough money to put in it. At the end, we were break even but we could not afford to put money in advance.
When I'll have time, I'll generate more packs and put money in ads ;)