The main problem with this game is that there's no indication of how far the wheels are turned, and they do not return to neutral (straight ahead) when you stop pressing left or right. This makes it very difficult to predict what the car will do next.
The hard badge is not that hard once you get the hang of it (which, admittedly, is the hard part).
It was only five minutes long, but that was a fun five minutes! Good game.
Leaning is non-intuitive. I eventually got the hang of it, but I agree with the previous poster who said the lean setting should reset every time.
Also, a lot of these checkpoints are in the worst possible positions. I guess that's the point, but it becomes needlessly difficult when I have to power on/brake at exactly the moment the bike spawns to avoid crashing.
While we're discussing bike spawns, it would be so much more helpful (and, I think, realistic) if the bike did not bounce when spawning. After watching the bike bounce around for half an hour after I crash, it's really frustrating to power on and then spin out and crash again just because I didn't see the bike bounce on spawn.
That said, I liked the game.
Calling it "Disc Battle" doesn't disguise the fact that it's a simple version of air hockey. One that shares flaws with a large number of identical games.