Not a bad 15-20 minute
Since enemies steer differently it would be nice to see if they drop hazards onto the tracks
No no, the game is made with Pico8 virtual console. This system has a lot a restriction, 128x128 pixels, 4 audio channels, 16 colours... and 8192 "Tokens" to simulate program memory. One of the challenge when programming on this system is to make a maximum of feature fit in those 8192 tokens. When hitting the limit, the only way to add feature is to optimize the ones that already exists. At a moment optimization also hit a limit and you have the best that pico8 can offer :)
The other way to go further is to port the game on a real platform where there is no such limit, such as unity or anything else. But that is another story