That's the kind of game I like to see in a jam ! This game offers a good little linear story, along with some sense of progression with the game being more and more riddled with bugs, and a boss at the end to top it all up !
I also liked the simplistic looks of it, nicely complimented with subtle postprocesses and effects. Well done !
On a slightly more negative note, I would really have like some sound FXs and BGM. I also foung a bug on the part where you reverse the player's inputs. When running above the starting point, if you jump and land, there's a chance to have the controls inverted back, propagating to the next levels.
Otherwise, that's all I could really note. The game is well balanced and put together. Congratulations !