Plants vs Zombies

I don't like tower defense games so I don't know how I got so addicted to this game. Maybe it's because of its nice graphics and original characters. One of my favourite casual games.

Plants vs Zombies @ Google Play

Puzzle Retreat

I'm not a huge fan of puzzle games but this one got me addicted. Graphics are nice, controls are responsive and levels keep you interested.

EDIT: Puzzles feel quite repetitive after you know all the types of tiles so don't expect new things in the paid levels.

Puzzle Retreat @ Google Play

10000000

This is a tile matching game with a twist. It combines RPG elements and what you do when matching tiles affects the character that advances through a dungeon, killing monsters and opening doors and chests. Simple and addictive.

10000000 @ Google Play

Spirit

Spirit is a simple yet stylish game with a fluid gameplay where you make holes in the space to absorb enemies. The only thing I don't like is that there are no checkpoints; you always start from the beginning. Besides that, it's perfect.

Spirit @ Google Play

Where's My Water

A puzzle game that features fine water physics and. Original, fun and well done. There's a related game called Where's My Perry.

Where's My Water @ Google Play

Trainyard

Draw rails so the trains get to the point that matches its color. I'm not a huge fan of puzzle games but I got completely hooked on this one. I almost completed the free version and paid for more levels.

Trainyard Express (free) @ Google Play
Trainyard @ Google Play

Gunman Clive

Classic platform game where you jump and shoot with a cowboy. Both the design and the game play are fenomenal. I can only complain that it's a bit short, but totally worth what it costs.

Gunman Clive @ Google Play

Jet Car Stunts

3D game where you run and jump across abstract circuits that aren't very detailed but don't lack fun. I don't usually like car games but this one is different.

Jet Car Stunts @ Google Play
Demo version here

Open Sea!

One of the most original games I've played in my Android. Drag over the sea to open a path so the people can cross it. There are several types of characters: normal, dumb, drunk, old, mummies (the bad guys), ... and some with special powers like Mo!

Open Sea! @ Google Play

Pudding Monsters

This awesome game excels at everything a good game should: 1) Mechanics: original, simple and full of possibilities. 2) Level design: makes the most of the mechanics and keeps you interested. 3) Art design: it's a joy just to see those puddings move, blink, stick, "talk", ..

Pudding Monsters @ Google Play

Bobbing

Fantastic game that reminds me of a mix between Super Hexagon and Gravity Guy. If you like simple and fast paced games you must try this.

Thanks to @willeeh for this recommendation!

Bobbing @ Google Play
Free levels version here

Super Stickman Golf 2

A fun minimalistic 2D golf game with powerups. Even better than the first part.

Super Stickman Golf 2 @ Google Play