Very cool concept!
I cannot enjoy most of the modes because the block randomizer stops at some point, only showing pink blocks (and fortunately still flames and skulls).
EDIT: I appreciate how you departed from PICO-8 aesthetics on this entry (not sure since when you did that but I like the new font, etc.). I saw you had a PICO-8 prototype though (surprised it’s not a SUGAR prototype but it was nice to get a super lightweight car to play with my PICO-8 binary). I’m surprised it was already so polished! And it didn’t have the pink block bug so it was quite nice to play even with just the standard mode.
The chain combustion even slowed down the game from 30 to 15 FPS!