Here are some Android games that have unobtrusive or fair ad experiences:
Stack
Description: Stack is a simple yet addictive puzzle game where players stack blocks to create a tower. The game has unobtrusive ads that appear only between levels and do not interrupt gameplay.
Official Download Link: https://play.google.com/store/apps/details?id=com.ketchapp.stack&hl=en_US&gl=US
Subway Surfers
Description: Subway Surfers is a popular endless runner game where players run through a subway system while avoiding obstacles. The game has fair ads that appear only after the player loses a run and can be closed easily.
Official Download Link: https://play.google.com/store/apps/details?id=com.kiloo.subwaysurf&hl=en_US&gl=US
Wordscapes
Description: Wordscapes is a popular word puzzle game where players find words hidden in a grid of letters. The game has unobtrusive ads that appear only between levels and do not interrupt gameplay.
Official Download Link: https://play.google.com/store/apps/details?id=com.peoplefun.wordcross&hl=en_US&gl=US
Fruit Ninja
Description: Fruit Ninja is a classic arcade game where players slice fruit with a sword while avoiding bombs. The game has fair ads that appear only after the player completes a set of levels and can be closed easily.
Official Download Link: https://play.google.com/store/apps/details?id=com.halfbrick.fruitninjafree&hl=en_US&gl=US
2048
Description: 2048 is a simple yet challenging puzzle game where players combine tiles to create the number 2048. The game has unobtrusive ads that appear only between games and do not interrupt gameplay.
Official Download Link: https://play.google.com/store/apps/details?id=com.estoty.game2048&hl=en_US&gl=US