Glad you enjoyed the game. The reason why the levels are, admittedly, empty is due to slowdown; the areas become much less bland as the game continues. Also happy that you enjoy Fygoon being such a terrible person, as that's exactly what I was going for.
Feel free to steal the idea of making a manual for your own game; I like having some small literature to read that isn't a shampoo bottle which is why I made a manual for my game.