– 115MB download
– Played in portrait mode
– Auto accelerate
– Has retro tracks
– Play with swipe
– Seems like the amount of items you can have depends on the character
– Two laps per race
– Character unlocks are the gacha mechanic
– Ex: Luigi is a rare character
– Each character has a special item

Mario
Luigi
Peach
Daisy
Toad
Toadette
Rosalina
Waluigi
Baby Peach
Baby Daisy
Baby Rosalina
Metal Mario
Larry
Lemmy
Ludwig
Dry Bones
Dry Bowser
Baby Mario
Baby Luigi
Wendy
Morton
Iggy
Donkey Kong

MKT has timers. Your ability to play the game is gated behind a "hearts" currency. Every start of a race costs one heart, and your default meter maxes out at five hearts. It takes roughly 12 minutes for a single heart to refill, while the game's opening portion constantly refills hearts as part of the early leveling-up process. It's unclear at what point this ample heart supply runs out and players are stuck either waiting on timers or spending an "emerald" currency for more hearts, which can either be earned in-game or (eventually) paid for with real-world money.

Additionally, the game's progression system to access new racetracks, through a single-player campaign, is hard-gated by its own set of timers. As I type this, I'm waiting a full hour before I can unlock the game's "Toadette Cup" of three racecourses, even though I've otherwise met its requirement of other progress. There's no way to pay in-game currency or real-world money to speed that unlock up.

MKT also has loot boxes. The game's aforementioned emeralds are required to access the game's loot. Spend five emeralds (no idea how much that will cost in real-world money) to get a single, random unlock of a mascot character, a go-kart model, or a "glider" accessory. Unlike past games, differing characters and karts don't appear to come with standard control trade-offs like strength, acceleration, top speed, and so on.