KarmaZoo Review (FaultBat)
There was a short period of time where this game was fantastic. You'd hop in and a handful of folks were your new best friends for the next 20 minutes or so, trying to work out how to get through challenges without being able to talk directly. The game was doing exactly what it promised.
However, a lot of the game actively worked against that ideal. Each character has secret side-quests, many of which required rushing ahead selfishly and couldn't be communicated to your friends. The cost of new unlocks quickly became prohibitive, and only a few of the characters' abilities actually make a significant difference in how to approach challenges (usually when challenges were designed so a particular ability was required.)
Adding onto this, there just aren't that many different levels, so as players got more experienced, the best strategy was to just try and rush through the same old levels as efficiently as possible to farm more unlocks. There became less and less for new players to do, as well, as experienced players would often choose the required characters if they'd already completed the side missions.
I'm not entirely sure why I wrote this all out, because while all these decisions, individually, I think, in the end are solvable, the result now is that there's basically no one playing. As of writing this, according to the charts, there are exactly two people in game. Maybe you could get in a game with them, but more than likely, the game is now totally unusable. There's nothing you can do in this game on your own.
I'd love to swap this to a recommend, if KarmaZoo is somehow revitalized, but I'm not holding my breath. It was a decent attempt, Pastagames.