People in other reviews say that it is like Mario Karts with legs, and they'd be right, when you're low skill.
Now this isn't to insult anyone who's new to playing the game, but when you've learnt all the mechanics, unlike mario karts there is a way to counter every single item you come across, only sometimes would you need another item to counter. Also unlike mario karts, items are not the largest part about it. There are 4 things that make you go fast 1: those boats that give you boost which you can use at any time 2: the bubbles that are in some parts of levels 3: If you have alot of velocity downward and you grapple you get alot of horizontal velocity 4: Same applies with number 3 but with slopes(stairs included) that are in the level.
3 & 4 is where I say that high-skilled players are separated from the low-skill that makes it unlike mario karts. Because most people who are new to the game don't know this(you should probably add it somewhere in the tutorial devs, or choose a different level that demonstrates these 2 well). Anyways, these 2 important mechanics are what most of the useful tricks in speedrunners are basically derived from, it basicallys makes up the speed in speedrunners. Its these 2 mechanics that make it fairly different from mario kart, because in mario kart, without the items its basically who knows the map's parts and who's learned which kart is best to use and how to do the turns well(which isn't very in depth).
That's what I wanted to say about how this game is not mario karts. This game is extremely fun and very competitive. I've been playing it for at least a few hours every day. I've put 229.5 hours into this game, just the last 2 weeks I've put 21.9 hours(which is more than what other people writing these reviews as of now have even ever played).
Sometimes speedrunners is buggy, and perhaps it could use some more maps, but this game is top-notch, no doubt about it.
the characters also amuse me. 10/10.