This is more my kind of game, I like the concept a lot, it would be nice to show tooltips during the race, e.g. to inspect opponents items, I got beat by the Gas Guzzler I think, a leaderboard would fit nice too, as for the graphics, they are kinda minimal but I like the color choices and style, the sounds were okay but there seems to be no music, overall a great entry.
your end life plan seems nice, async multiplayer would be good for this kinda game.
Good job!