Although the challenge of the game goes away quite fast, I think the factory building aspect of it is quite cool. I also like that it has music and sound effects.
Also, no offense, but I wouldn't be surprised if you went with a cardboard cutout art style because you thought that way you could have an art style without being good at drawing, because that's my level of bad art skill.
Also I believe it would be cool if you added product production, considering you can't currently make glass into anything for example.