This is a first impressions after 1 hour of gameplay
Zero Gear is a Kart Racer that just reeks of mediocrity. The physics are completely off, making steering your Kart extremely difficult. The weapons are worthless and often help your opponents more than they harm them (like boosting them straight forward). The tracks range from boring to dreadful, and some of them are so long and tedious that I felt like hitting my head against the keyboard. The game promises 15 maps but fails to tell you that about 6 of them are ♥♥♥♥ty mini games that are amusing for about 2 minutes each. What made games like Mario Kart 64 great was that the levels were well designed and infinitely replayable, Zero Gear just doesn't have that. The community is as good as dead, and last time I checked there were about 3 games up, the fullest of which had 4 players on it. The AI is so unbelievably stupid that they're not even worth playing against.
The game is not all terrible however, the graphics are nice and colourful, the music is alright and there's some neat customization options for your character and kart, but when the game is so fundamentally broken, none of these things matter Most of the positive reviews for this game seem to be from people who either got it for free or paid 0,99 cents for it during the Summer sale of 2014. A bad game is a bad game regardless of how much you paid for it, and Zero Gear is undoubtedly a bad game.