For a first game this is impressive, doubly so i’d say since this is on Pico8 :O
The sprites look really good and i particularily liked the paralax effect on the scrolling sides, and the music is also really boppin, cool as well that you made a difficulty selection that you can even change after dying if the current one felt too high.
I also gotta point as positive the Eco theme you chose :)
Overall i had fun trying it out, i just think i encountered a bug while playing where the game crashed just in case no one encountered this yet, here’s the screenshot :
Regardless, good job ^^