I liked the Infectonator series, I had them on my smartphones.. real old-school but don't float my boat no more aha. 3.5/5
Addicting and fun. Keep it up.
it was very easy :(
I initially rated it 5 and thought the game was fun and short, like most people. However, when you made "Clear all 13 levels" achievement you basically told the player that the game is beatable, and it's not. Proof http://i.imgur.com/IXo3Ybd.png
As you can see, you need 50 kills to beat 13th level, but only 49 enemies are spawned, which makes the level impossible to beat. I played hacked version for testing purposes and 13th level simply restarts back to shop menu when you kill everyone. On top of that, not even all 49 enemies counted as kills. Even if it was beatable, 60 seconds/13 levels = 4 seconds for each level = Dumb game design!
Aside from this, game has a fun concept. It spawned way too many sequels to the point where it's not resembling the original anymore and the authors are whoring the hell out the series.
I have to agree with everybody else in the comment section; "very addicting, yet short".