Cool, did you draw the boss?
Anyway, nice work! My constructive cristicism would be to be careful with pixel size inconsistence, that means the size of 1 pixel on your foreground is diferent of the size of 1 pixel in the background! This can make the game not look so good as it could.
In general i am liking what i see : )
I draw the boss and carachter and tiletes all by myself And you can play it on mobile https://pixelanto.itch.io/pig2r
:)))))