The Brown Reviews takes you in a very hard-coded EXE, which is a remake of a Sonic game: SRB2 Riders. Now let's go, shall we?
First things first, the Single-Player. The SP is incredibly amazing, due to the add of bots, which makes the SP more fun. But it comes with some defaults; mostly in the shortcuts' section.
First, though it doesn't bother me, if you didn't finished first, you must restart the race again and again until you made it. Now since we got 6/7 bots with a boost ability plus shortcut overuse, you sure want to do the same to finish the level first, considering that you restart it if you didn't. Problem is, most of the shortcuts aren't worth the use because bots will pass you if you use them. In this spoiler, there is all of the shortcuts that need to fixed.
[spoiler:b8ced5e475]Metal City: 1st Power: It's self-explanatory. Since there's another Power shortcut, you wanna take it out.
Night Chase: Power, Speed: The Power one is, again, self-explanatory. The Speed one should be like Metal City's
Splash Canyon: 1st and 2nd Fly(both after the 1st checkpoint), 2nd Power: Both of the Fly ones are just useless, you wanna take that floating bridge-like thing if your removing both of them. Power one is... well you know what I mean.
Red Canyon: Power: Please give REAL SHORTCUTS to Power Types instead of blocks putted in there with no shortcut value.
Egg Factory: Fly, Speed: The Fly one is misplaced. The Speed one should be like Metal City's too.
Ice Factory: Power.
Green Cave: Fly: Again, it shouldn't be in there.
White Forest: All: The Fly one shouldn't be in that place and the Speed one should be like Metal City's. And you should put those blocks in the beginning of the path instead of the end to make the Power one decent.
Sand Ruins: Fly, Speed: Speed, for this one, should go straight, and Fly should be moved somewhere else. In this case, the two floating platforms should be eliminated, and that high path too.
Dark Desert: Fly: For this one, you only need to take out that air turn to be good.
Babylon Garden: Fly: Should be moved some place else.
Digital Dimension: None.
Babylon Guardian: All: Why do we even need shortcuts in here?[/spoiler:b8ced5e475] Now the Bonus Levels, and we start with Sonic R: This is good. the problem I have with is the Flight; Why is it sooo slow?! It isn't that slow in Sonic R though(It's more Sonic Rivals 2's Flight if you ask me).
And Mario Kart is the best of the two. I actually found the problem with the finish line in Dusty Desert. You need to be in the middle of the line to finish a lap, which is bad. Enlarge that finish line and it's better. What was disappointing was that there was no bots, but oh well.
Overall it might rival SRB2 2.0 but who knows.
Note: 18/20