Really awesome visuals, I love the low-poly 3D look. It’s colourful and inviting. Interesting idea with the one-button racing, too.
The controls didn’t quite work for me, though. You move very fast even without speed increases, and I never found a consistent way to get around corners without kind of fluttering the turn button, which I don’t think is the intended strategy. Bumping is frequent, and because of the way it knocks you back, it really disrupts the flow of gameplay. I know I’m probably just bad at the game, and I like (and make!) hard games, so that’s fine. However, it’d be nice if even when you fail, you at least got to still have a good time. (A bit of a longer track might help with the repetition/frustration too!)
Side note about the controls: there’s a reason most racing games let you turn both directions. If you turn too far left in this game, you have no way of correcting, and at one point I ended up bumping infinitely against a wall until I managed to do a full 360. Being unable to fine-tune my movement probably contributed to my difficulties with the gameplay. For me at least, the controls were maybe a bit too simple. I’m sure there’s a way to design around this while keeping the controls that make your game unique, though.
Overall, this is really impressive and polished work for a game jam! With some tweaking to the controls, you could have a simple and addictive racing game on your hands. (I bet this would do really well on mobile!)