Free rythm game where you tap your fingers to the beat.
The beat is indicated by hit circles, when the hit circle reaches the note, you tap it.
Extemely sensitive and hard to get accuracy, but leaderboards makes it all worth it.
There are 35 songs currently in the game, 9 of them are free and the rest are payware.
Comes in 3 difficultys per song.

Rythm game where you tap your fingers to the beat.
The beat is indicated by a line that goes up an down and when it's in the middle of a circle you tap it.
It's not nearly as sensitive as Osu!Stream, accuracy is much easier to get and the score relies on combo.
You get 8x12 maps (8 chapters with 12 maps each) for buying the game. The rest is payware.
Comes in 2 difficultys per song.

Sci-fi game where you play as captain Keith Maxwell and get to pilot your own spaceship through the galaxy.
Just the freeware version alone is huge, it includes a campaign and a ton of side quests. It also has allignments and factions and there's a lot of ways to earn money, for example mining minerals from asteroids, trading wares and illegal drugs between the solar systems, becoming a pirate, and just doing quests.
There's a bit of grinding involved, but it's totally worth your time.
The payware just adds a bit of extra stuff. Extra campaigns, ships, weapons etc

Google.

Difficult game where you dodge things.

Difficult game where you dodge things in a tunnel. Tilt to move.

FPS or something

A scroller game where you play as a box. Tap to jump and try to avoid the obstacles while listening to awesome music.
Very simple and refined compared to Geometery Dash.
Free version isn't good enough to mention. Just a demo etc.

A scroller game where you play as a box. Tap to jump and try to avoid the obstacles while listening to awesome music
Lots of special effects compared to Impossible Game.
Comes with level editor.

Interesting rogue-like with futuristic elements. You control a spaceship with crew and your objective is to destroy the rebel mothership. During the game you get to collect scrap and upgrade your ship to survive.
There are 9 ships to unlock and the game has very high replayability.

Origami game.

Zombie game. You can eat your friends!

Citybuilding game.