Thanks a lot for the comments and feedback! :-)
It's a relief about the art style, because this is my first time drawing things myself (took the jam's opportunity to jump into pixelart).
I was trying to pace the first stages (and the first moments of gameplay) to give the player time to explore and learn each effect, but I guess random glitch appearances plus going full-on textless was too much... Will probably make changes after the jam to help with this.