I played a game called 'sniper strike' during covid and then stopped midway. A few days ago the name suddenly popped in my memory and I re-downloaded it. It's doesn't have much options. You only got 10 energy points and one is used for each mission. You gotta wait for it to refill then only you can play the major missions. Tbh it keeps me away from it, which is good.
It's not very advanced, but it has this awesome clear graphics for the very little it offers. Earlier I used to think it was difficult and not at all finish-able, but now it's slowly growing on me.