This is Rayark's most recent rhytm game, the same developers of Cytus. There is no "full version" purchase, but you can purchase keys to unlock songs or gain them by completing challenges. Personally, I don't really like this "P2P" system, but it is what it is.
Story
Unlike Cytus, VOEZ has an official story with characters and locations. In the diary, you unlock pages by completing goals like "play 10 different songs". Some of the goals will also give you a free key.
Menu
There are many avatars you can choose from, most of them are unlocked by paying a key to get random icons. Next off there's a song selection, you swipe horizontally to see everything. 
They're sorted into song selections, packs with 5 songs you unlock all at once using 5 keys. If you run out of songs, there's the limited time and watch ad selections.
Gameplay
These are tap notes. You have to tap them before they fall beneath the black line.
The notes to the right are hold notes, you hold them until they disappear. 
This is a moving variation of the hold note. Yes. Moving hold notes. They follow the red stripes, so your objective is follow it along too.
(Ignore the fact that it says level 41, it's modded.)
These are slide notes, but you could also call them automatic notes. As long as you hold the pillar they're in before they fall, you get an automatic full perfect.
This is a swipe note, you have to swipe it into the direction according to where the blue arrow points at the right time.
Scoring
There are marks in this rhytm game too.
C
0 - 779999 points
B
780000 - 879999 points
A
880000 - 949999 points
S
950,000 - 1,000,000 points
There are 4 timings: Miss, OK, Perfect and Max. Perfect. You can reach million only if you have all Max. Perfect.
There are also two titles. Full Combo and All Perfect.
For Full Combo you must avoid missing, and for All Perfect, you must get all notes with a Perfects and Max. Perfects
Difficulty
Every song in the game has 3 difficulties: Normal, Hard and Special.
The difficulty ranges from level 1-16.
Soundtrack
Features a lot of genres. It currently even has 2 selections each for Cytus and Deemo (Another rhytm game. Another review? OwO)
fancy.