This game. Oh boy this game. Just don't even bother. Simple as that. Here is why...
It is broken. The mouse controls are just down right broken. I could only continue playing this because I have an xbox controller to plug in. Even then this game is barely playable. The physics...who programed these physics, they make no sense. Was no effort put into making this? When you roll down a hill, hit another hill GOING THE OPPOSITE WAY, you somehow gain speed and keep going up. This can be level breaking in some levels in which you have to stop or you will fall off.
The first chapter has 30 levels and the second chapter has 9. Did they forget how to count? Why the sudden change? I am still trying to finish the game 100% and so I do not know how many levels are in the final third "Event" but at this rate it should be around 3. It seems that as the game development progressed the just completely gave up. Speaking of giving up on design, there are a few levels that made me laugh. Some are so badly designed... but 2-8 comes to mind. Which is it devs: slow down the hill OR avoid bolders. You can barely do both. Not to mention that gem at the start of the track makes me laugh. Really a gem under the track? Was there a misclick when level editing? If you slow down to get it (it just randomly gets absorbed up the drivers ♥♥♥ if you are slow enough) or flip over to get it, with your clipping head, you will not make it down the first hill. Which is the first obstacle of the level. Why not shift over that track under the first hill a bit to the right? You can barely land on it. If you slow down to do that you will get hit by the boulders, which are btw REALLY closed together in drop time. Ugh. *Facepalms*
The ♥♥♥♥ing gems. Half my playtime is me idling as I rub my temples and breathe in and out slowly, and me redoing levels because the hitbox radius on the vehicle is ♥♥♥♥ing broken. I have literally passed over collectable gems, they have entered my pixelated body, and then they have quickly shot out of my ♥♥♥ for no apparent reason. This can cause you to redo levels just because a gem decided that this day wasn't its day to be collected.
The art. Is it art? I am getting a bit sick of pixelated games on steam. Some are really well done and beautifuly made. Most aren't. And it is starting to get to me. This is 2014 there is no need to pixelate your game to make it seem retro. Specially if you are awful at pixel art. This game looks like mario had too much to drink and then vomited. The devs then took his pixelated puke and used that as art. The colors and contrast are bad. there is no sense of a color palette. Every pixel just blends in together and it is very hard to focus on things. There is no form of siloutte on the player, course, and the background. It looks like a free flash game on Newgrounds that gets maximum 2/5 stars. The UI is pretty funny. When I tell you that a word is greyed out, you would think that means locked or unclickable right? Nope grey words are the main thigns you click on. White words are...I am not even sure. Just info and random words on the side. It took me a while to know what was going on with the UI because there is so much going on in the background that all the pixels just kind of blend together. The MAIN menu is simple but everythign beyond that is laughably bad.
Speaking of the main menu, just sit there and watch. The main menu tells you how bad this game is. Watch the drivers. 9/10 don't make it over the fist gap. When they don't even put effort into a simple track in the main menu, you should get an idea of what is to come in the actual levels.
Anyway I could honestly go on and on about how awful this game is. And in case you are wondering I am only finishing it and playing it because I enjoy finishing bad games and the achievements are fairly easy. I will say that the amount of customization on the driver IS nice but the pixel art, once again, is so god awful that there is no sense of visual satisfaction when you change your driver and cart gear.
The amount of customization and the gem bank mechanic where collectables turn into usable money is pretty good. But everything else sucks. Therefore my final thoughts are: This game is broken, ugly, and not fun. Don't bother.