I liked playing your turn left game on the airplane, Ilan.
Simple yet challenging because you want to do more rounds.
The same goes for that spider game.
using xui2d or libgdx/spritekit doesn't mean that you will create a successful game.
But it makes it easier because a lot of math is done for you but it all comes to luck these days.
there are a lot of really high tech games with barely 1000 installs just because they are pushed away by those who got their fame years ago
and yes that includes the cheaters who released the same game a dozen times under a different account. (discussed before)
if you want money numbers... I'm currently around €120/month and that's with just some puzzle games. At some time when one of them was in the top 250 for Belgium/Holland for a few months it peaked upto €700+. the challege is to stay in that top 250 I guess so that you have your daily new installs/users & visibility.
When you get out of it it's mostly word of mouth suggestions or luck on searches.
Can I live from it? no. Will I be rich from it? no. But it's a nice extra and enough to pay licenses (B4X, apple ...) etc.