Physical Qualities:
The graphics are so-so. Nothing special about them but it is the style of this development team with the majority of their games. The audio is the same way. Nothing flashy or spectacular but it is appropriate. The feel of the game flows okay. Little confusion as to wat to do. It's left to the player to explore the game and find where everything is and how it all works.

Gameplay:
The gameplay is decent. You train your racer to be faster, more agile, smash burgers to gain health which affects performans, etc. The game gets very grindy. It's the same thing over and over until your stats are high enough to progress through the races and go on to tougher opponents. Even then, it's still the same thing all the way until the end. The player does not control the racer except during training. The controls and directive are explicit. The training plays out as a minigame.

Replayability: After getting the badges, I plan to never touch the game again. I think it only has replay value just for the fact it takes time to beat the game entirely (if you stick it out until the very end) and you will need to come back a few times to do so.

Hack Power:
The game has some hacks for it. Nothing crazy over the top. Perfect amount for just blasting the game away and never having to play it again.

Overall, I'd recommend getting the badges as quickly as possible and not bothering with the game ever again.